Calls

A Call represents a connection between a phone or user agent and CPaaS.This may be inbound or outbound.The Calls list resource represents the set of phone calls originated and terminated from an account.

Call Resource URI

/2012-04-24/Accounts/{AccountSid}/Calls/{CallSid}

Calls Attributes

Attribute	Description
Sid	A string that uniquely identifies this call.
ParentCallSid	A string that uniquely identifies the call that created this leg.
DateCreated	The date that this call was created.
DateUpdated	The date that this call was last updated.
AccountSid	The unique id of the Account that created this call.
To	The phone number or identifier that is the recipient of the call. When the call is created from a WebRTC session, the Sender is represented by the SIP URI.
From	The phone number or identifier that originated the call. When the call is created from a WebRTC session, the Sender is represented by the SIP URI.
PhoneNumberSid	If the call was inbound, this is the Sid of the IncomingPhoneNumber that received the call.
Status	A string representing the status of the call. Possible values are queued, ringing, in-progress, completed, failed, busy and no-answer.
StartTime	The start time of the call. Empty if the call has not yet been started.
EndTime	The end time of the call. Empty if the call has not ended.
Duration	The length of the call in seconds.
Direction	A string describing the direction of the call. Possible values are inbound, outbound-api, and outbound-dial
AnsweredBy	If this call was initiated with answering machine detection, either human or machine. Empty otherwise.
ApiVersion	Displays the current API version
ForwardFrom	If this call was an incoming call forwarded from another number, the forwarding phone number (depends on carrier supporting forwarding). Empty otherwise.
CallerName	If this call was an incoming call, the caller’s name. Empty otherwise.
Uri	The URI for this account, relative to \https://$DOMAIN/api/2012-04-24/.

Attribute

Description

Sid

A string that uniquely identifies this call.

ParentCallSid

A string that uniquely identifies the call that created this leg.

DateCreated

The date that this call was created.

DateUpdated

The date that this call was last updated.

AccountSid

The unique id of the Account that created this call.

The phone number or identifier that is the recipient of the call. When the call is created from a WebRTC session, the Sender is represented by the SIP URI.

From

The phone number or identifier that originated the call. When the call is created from a WebRTC session, the Sender is represented by the SIP URI.

PhoneNumberSid

If the call was inbound, this is the Sid of the IncomingPhoneNumber that received the call.

Status

A string representing the status of the call. Possible values are queued, ringing, in-progress, completed, failed, busy and no-answer.

StartTime

The start time of the call. Empty if the call has not yet been started.

EndTime

The end time of the call. Empty if the call has not ended.

Duration

The length of the call in seconds.

Direction

A string describing the direction of the call. Possible values are inbound, outbound-api, and outbound-dial

AnsweredBy

If this call was initiated with answering machine detection, either human or machine. Empty otherwise.

ApiVersion

Displays the current API version

ForwardFrom

If this call was an incoming call forwarded from another number, the forwarding phone number (depends on carrier supporting forwarding). Empty otherwise.

CallerName

If this call was an incoming call, the caller’s name. Empty otherwise.

Uri

The URI for this account, relative to \https://$DOMAIN/api/2012-04-24/.

Call Duration

The call duration shall be equal to the difference between the startTime and endTime timestamps, rounded up using a ceiling function.For example, if the delta between start/end timestamps is 10.1 seconds, then the call duration is 11 seconds.

When the application processes a Dial verb, the dial ringing time will NOT be taken into account.This measure prevents overcharging in situations such as when the RCML application consists of a single Dial verb, for example.

Get call details

HTTP GET.Returns the representation of a Call resource, including the properties above.

Call List Resource URI

/2012-04-24/Accounts/{AccountSid}/Calls

Supported Operations

HTTP GET.Returns the list representation of all the Call resources for this Account, including the properties above.

HTTP POST.Makes a new Call and returns the representation of the Call resource, including the properties above.Below you will find a list of required and optional parameters.

Request Parameters

Parameter Description

Parameter	Description
From(Required)	The phone number to use as the caller id.
To(Required)	The phone number to call.
Url(Required)	The fully qualified URL that should be executed when the call connects.
Method	The HTTP method CPaaS should use when making its request to the above Url. Defaults to POST.
FallbackUrl	The URL that CPaaS will request if execution of Url fails for any reason.
FallbackMethod	The HTTP method that CPaaS should use to request the FallbackUrl. Must be either GET or POST. Defaults to POST.
StatusCallbackEvent	A comma separated list of events on which we are interested to get a callback on. Possible values are `initiated`, `ringing`, `answered`, `completed`. Default none
StatusCallback	URL to receive the callback events at. Default none
StatusCallbackMethod	`GET`, `POST`. Default `POST`
Timeout	The number of seconds that CPaaS should allow the phone to ring before assuming there is no answer. The default is 60 seconds.

From(Required)

The phone number to use as the caller id.

To(Required)

The phone number to call.

Url(Required)

The fully qualified URL that should be executed when the call connects.

Method

The HTTP method CPaaS should use when making its request to the above Url. Defaults to POST.

FallbackUrl

The URL that CPaaS will request if execution of Url fails for any reason.

FallbackMethod

The HTTP method that CPaaS should use to request the FallbackUrl. Must be either GET or POST. Defaults to POST.

StatusCallbackEvent

A comma separated list of events on which we are interested to get a callback on. Possible values are initiated, ringing, answered, completed. Default none

StatusCallback

URL to receive the callback events at. Default none

StatusCallbackMethod

GET, POST. Default POST

Timeout

The number of seconds that CPaaS should allow the phone to ring before assuming there is no answer. The default is 60 seconds.

StatusCallbackEvent

When creating a Call using the Calls API, an outbound call is initiated. The call transitions from the initiated state to the ringing state when the phone starts ringing. It transitions to the answered state when the call is picked up, and finally to the completed state when the call is over. With StatusCallbackEvent, you can subscribe to receive webhooks for the different call progress events: initiated, ringing, answered, or completed for a given call.

The StatusCallbackEvent attribute allows you to specify which events CPaaS should webhook on. To specify multiple events separate them with a comma like this: initiated,ringing,answered,completed. If a StatusCallback is provided and no status callback events are specified the completed event will be sent by default.

Event Description

Event	Description
initiated	The `initiated` event is fired when CPaaS starts dialing the call.
ringing	The `ringing` event is fired when the call starts ringing.
answered	The `answered` event is fired when the call is answered.
completed	The `completed` event is fired when the call is completed regardless of the termination status: `busy`, `canceled`, `completed`, `failed`, or `no-answer`. If no `StatusCallbackEvent` is specified, `completed` will be fired by default.

initiated

The initiated event is fired when CPaaS starts dialing the call.

ringing

The ringing event is fired when the call starts ringing.

answered

The answered event is fired when the call is answered.

completed

The completed event is fired when the call is completed regardless of the termination status: busy, canceled, completed, failed, or no-answer. If no StatusCallbackEvent is specified, completed will be fired by default.

StatusCallback

The StatusCallback attribute allows you to specify a URL for CPaaS to send webhook requests to on each event specified in the StatusCallbackEvent attribute.

StatusCallbackMethod

The StatusCallbackMethod attribute allows you to specify which HTTP method CPaaS should use when requesting the URL in the StatusCallback attribute. The default is POST.

Status Callback HTTP Parameters

The CPaaS parameters passed to your application in its asynchronous request to the StatusCallback URL include all parameters passed in a synchronous request to retrieve RCML when CPaaS receives a call to one of your numbers. The full list of parameters can be found in the RCML Voice Request documentation Request Parameters.

When the call progress events are fired, the Status Callback request also passes these additional parameters:

Parameter Description

Parameter	Description
CallDuration	The duration in seconds of the just-completed call. Only present in the `completed` event.
Timestamp	The timestamp when the event was fired, given as UTC in RFC 2822 format.
CallbackSource	A string that describes the source of the webhook. This is provided to help disambiguate why the webhook was made. On Status Callbacks, this value is always `call-progress-events`.
SequenceNumber	The order in which the events were fired, starting from `0`. Although events are fired in order, they are made as separate HTTP requests and there is no guarantee they will arrive in the same order.
SipHeader_Diversion	Values of Diversion header from SIP protocol or default values from the subscriber profile. This parameter can be present multiple times because of SIP Diversion header can be multiple. For more information about this field, please check out RFC 5806
SipHeader_History-Info	The value of History header from the SIP protocol or the default value from the subscriber profile. This parameter can be present multiple times because there could be multiple headers. For more information about this field, check out RFC 4244

CallDuration

The duration in seconds of the just-completed call. Only present in the completed event.

Timestamp

The timestamp when the event was fired, given as UTC in RFC 2822 format.

CallbackSource

A string that describes the source of the webhook. This is provided to help disambiguate why the webhook was made. On Status Callbacks, this value is always call-progress-events.

SequenceNumber

The order in which the events were fired, starting from 0. Although events are fired in order, they are made as separate HTTP requests and there is no guarantee they will arrive in the same order.

SipHeader_Diversion

Values of Diversion header from SIP protocol or default values from the subscriber profile. This parameter can be present multiple times because of SIP Diversion header can be multiple. For more information about this field, please check out RFC 5806

SipHeader_History-Info

The value of History header from the SIP protocol or the default value from the subscriber profile. This parameter can be present multiple times because there could be multiple headers. For more information about this field, check out RFC 4244

StatusCallback GET Example of Multiple Diversion Header Values

The order of headers is important.The top most SIP headers will appear first in the URL query parameters.

http://127.0.0.1:65444/1111?CallSid=ID000000000000003132372e302e302e31-CAc6e378e2e7164c21bef7b9508d89e86e&InstanceId=ID000000000000003132372e302e302e31&AccountSid=ACae6e420f425248d6a26948c17a9e2acf&From=bob&To=%2B1111&CallStatus=ringing&ApiVersion=2012-04-24&Direction=inbound&CallerName=null&ForwardedFrom=null&CallTimestamp=2021-12-15T10%3A29%3A28.539%2B01%3A00&SipHeader_Diversion=%3Ctel%3A%2B19195551002%3E%3Breason%3Duser-busy%3Bscreen%3D%22yes%22%3Bprivacy%3D%22off%22&SipHeader_Diversion=%3Ctel%3A%2B19195551001%3E%3Breason%3Dunconditional%3Bscreen%3D%22yes%22%3Bprivacy%3D%22full%22

Making a call to a SIP account

Restcomm will make a call to any SIP account that is reachable.It the example below, the SIP account is listening on port 5060.When you make the call, the SIP phone on which Alice is registered will ring and the hello-play.xml file will be played.

curl -X POST https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls.json  \
   -d 'From=16175551212' \
   -d 'To=sip:alice@mycompany.com' \
   -d 'Url=https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml' \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';

request.({
      method: 'POST',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN },
      form: {
         'From': '16175551212',
         'To': 'sip:alice@mycompany.com',
         'Url': 'https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml'
      }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
});

from http.client import HTTPSConnection
from base64 import b64encode
from urllib.parse import urlencode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass,
    'Content-type': 'application/x-www-form-urlencoded',
    'Accept': 'text/plain' }

# Update POST parameters accordingly
params = urlencode({
   'From': '16175551212',
   'To': 'sip:alice@mycompany.com',
   'Url': 'https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml'
})

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("POST", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json',
      params, headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";


   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL(("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Calls.json");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("POST");
      conn.setDoOutput(true);
      DataOutputStream os = new DataOutputStream(conn.getOutputStream());

      // Update POST parameters accordingly
      os.writeBytes("From=16175551212&" +
        "To=sip:alice@mycompany.com&" +
        "Url=https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml");
      os.close();

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

Making a call to a Restcomm client

You must first create a Restcomm client.In the example below, the Restcomm client created is called Alice.When you make the call, the SIP phone on which Alice is registered will ring and the hello-play.xml file will be played.

curl -X POST https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls.json  \
   -d 'From=16175551212' \
   -d 'To=client:alice' \
   -d 'Url=https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml' \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';

request.({
      method: 'POST',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN },
      form: {
         'From': '16175551212',
         'To': 'client:alice',
         'Url': 'https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml'
      }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
});

from http.client import HTTPSConnection
from base64 import b64encode
from urllib.parse import urlencode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass,
    'Content-type': 'application/x-www-form-urlencoded',
    'Accept': 'text/plain' }

# Update POST parameters accordingly
params = urlencode({
   'From': '16175551212',
   'To': 'client:alice',
   'Url': 'https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml'
})

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("POST", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json',
      params, headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";


   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL(("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Calls.json");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("POST");
      conn.setDoOutput(true);
      DataOutputStream os = new DataOutputStream(conn.getOutputStream());

      // Update POST parameters accordingly
      os.writeBytes("From=16175551212&" +
        "To=client:alice&" +
        "Url=https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml");
      os.close();

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

This Client URI may contain URI params to declare propietary SIP headers to be included in the outgoing INVITE message.

curl -X POST https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls.json  \
   -d 'From=16175551212' \
   -d 'To=client:alice?X-Custom-Header1=1234' \
   -d 'X-Custom-Header2=432' \
   -d 'Url=https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml' \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';

request.({
      method: 'POST',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN },
      form: {
         'From': '16175551212',
         'To': 'client:alice?X-Custom-Header1',
         'X-Custom-Header2': '432',
         'Url': 'https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml'
      }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
});

from http.client import HTTPSConnection
from base64 import b64encode
from urllib.parse import urlencode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass,
    'Content-type': 'application/x-www-form-urlencoded',
    'Accept': 'text/plain' }

# Update POST parameters accordingly
params = urlencode({
   'From': '16175551212',
   'To': 'client:alice?X-Custom-Header1',
   'X-Custom-Header2': '432',
   'Url': 'https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml'
})

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("POST", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json',
      params, headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";


   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL(("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Calls.json");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("POST");
      conn.setDoOutput(true);
      DataOutputStream os = new DataOutputStream(conn.getOutputStream());

      // Update POST parameters accordingly
      os.writeBytes("From=16175551212&" +
        "To=client:alice?X-Custom-Header1=1234&" +
        "X-Custom-Header2=432&" +
        "Url=https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml");
      os.close();

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

You can also provide a list of events you are interested in getting notified on and provide a URL to receive them at.Here’s an example for receiving answered and completed events.The callbacks will be made at http://status.callback.url

curl -X POST https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls.json  \
   -d 'From=16175551212' \
   -d 'To=client:alice' \
   -d 'Url=https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml' \
   -d 'StatusCallbackEvent=answered,completed' \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';

request.({
      method: 'POST',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN },
      form: {
         'From': '16175551212',
         'To': 'client:alice',
         'Url': 'https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml',
         'StatusCallbackEvent': 'answered,completed'
      }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
});

from http.client import HTTPSConnection
from base64 import b64encode
from urllib.parse import urlencode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass,
    'Content-type': 'application/x-www-form-urlencoded',
    'Accept': 'text/plain' }

# Update POST parameters accordingly
params = urlencode({
   'From': '16175551212',
   'To': 'client:alice',
   'Url': 'https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml',
   'StatusCallbackEvent': 'answered,completed'
})

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("POST", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json',
      params, headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";


   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL(("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Calls.json");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("POST");
      conn.setDoOutput(true);
      DataOutputStream os = new DataOutputStream(conn.getOutputStream());

      // Update POST parameters accordingly
      os.writeBytes("From=16175551212&" +
        "To=client:alice&" +
        "Url=https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml&" +
        "StatusCallbackEvent=answered,completed");
      os.close();

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

Calling a DID number

The above example shows how to make a call to a SIP number.If you want to make a call to a DID one, you must have a registered Restcomm number first.You can register a number by logging into your Restcomm Console and following the steps in the Getting Started Guide.

You can also purchase a number via the IncomingPhoneNumbers API.

Modifying Live Calls

Real time call modification allows you to interrupt an in-progress call and terminate it or have it begin processing RCML from a new URL.This is useful for any application where you want to asynchronously change the behavior of a running call.For example: hold music, call queues, transferring calls, forcing hangup, etc.

Live Call Modification API is supported only for calls created with Dial verb using a RCML application, or initiated via the Calls API.

HTTP POST to a Call

To redirect or terminate a live call, you make an HTTP POST request to an in-progress Call instance resource URI:

/2012-04-24/Accounts/{AccountSid}/Calls/{CallSid}

/2012-04-24/Accounts/{AccountSid}/Calls.json/{CallSid}

The following parameters are available for you to POST request when modifying a phone call:

Request Parameters

Parameter	Description
Url	A valid URL that returns RCML. Restcomm will immediately redirect the call to the new RCML.
Method	The HTTP method Restcomm should use when requesting the above URL. Defaults to POST.
Status (deprecated)	Either canceled or completed. Specifying canceled will attempt to hangup calls that are queued or ringing but not affect calls already in progress. Specifying completed will attempt to hang up a call even if it’s already in progress.
Mute (deprecated)	Either true or false. Setting value of this parameter to true will mute the call. Setting value of this parameter to false will unmute the call.

Parameter

Description

Url

A valid URL that returns RCML. Restcomm will immediately redirect the call to the new RCML.

Method

The HTTP method Restcomm should use when requesting the above URL. Defaults to POST.

Status (deprecated)

Either canceled or completed. Specifying canceled will attempt to hangup calls that are queued or ringing but not affect calls already in progress. Specifying completed will attempt to hang up a call even if it’s already in progress.

Mute (deprecated)

Either true or false. Setting value of this parameter to true will mute the call. Setting value of this parameter to false will unmute the call.

The Mute parameter is deprecated!

The mute feature in LCM has been marked as deprecated and will be discontinued in the future!

As alternative, users are encouraged to perform LCM by setting the URL parameter to point to an RCML document that contains either the <Hold> or <Resume> tags for, respectively, muting or un-muting the call leg.

Differences between Mute and Hold/Resume:

Hold/Unhold will send a SIP re-INVITE to the SIP Peer with a new SDP offer that sets the RTP connection to "sendonly" or "recvonly"
Mute will "silently" update the RTP connection on CPaaS side. The remote SIP peer won’t know about it because no SIP re-INVITE is sent.
Hold/Unhold generate a corresponding SDR record. Mute does not.

The Status parameter is deprecated!

The Status parameter in LCM has been marked as deprecated and will be discontinued in the future!

As alternative, users are encouraged to perform LCM by setting the URL parameter to point to an RCML document that contains a <Hangup> or <Reject> tags for, respectively, marking a call as completed or canceled.

Call in-Progress

Note that any call which is currently ringing within a Dial verb is in-progress from the point of view of Restcomm, and thus you must use 'Status=completed' to cancel it.

Optional Parameters

You may POST the following parameters:

Request Parameters

Parameter Description

Parameter	Description
FallbackUrl	A URL that Restcomm will request if an error occurs requesting or executing the RCML at Url.
FallbackMethod	The HTTP method that Restcomm should use to request the FallbackUrl. Must be either GET or POST. Defaults to POST.
StatusCallback	A URL that Restcomm will request when the call ends to notify your app.
StatusCallbackMethod	The HTTP method Restcomm should use when requesting the above URL. Defaults to POST.
MoveConnectedCallLeg (deprecated, see ChildCallMode)	If True, Restcomm will move both call legs to the new URL
ChildCallMode	It can take one of the three values below: * Hangup: Restcomm will hang up the child call if the parent call is modified through Live Call Modification. This is the default behavior and equivalent to the current behavior of MoveConnectedLeg=False. * Move: Restcomm will move the child call to used the same url that was used to modify the parent call. This is equivalent to the current behavior of MoveConnectedLeg=True. * StayConnected: All call legs will still continue to stay connected and process an RCML from an existing URL. A call leg with `CallSid` will start interpreting a new RCML from a newly provided URL in a parallel mode. When this new RCML that is running in parallel is over, this will not terminate the call leg unlike the existing RCML does. The call legs will be terminated either after a SIP BYE from a peer is sent, when the RCML from the existing URL is over, or when any RCML contains a "<Hangup>" verb.

FallbackUrl

A URL that Restcomm will request if an error occurs requesting or executing the RCML at Url.

FallbackMethod

The HTTP method that Restcomm should use to request the FallbackUrl. Must be either GET or POST. Defaults to POST.

StatusCallback

A URL that Restcomm will request when the call ends to notify your app.

StatusCallbackMethod

The HTTP method Restcomm should use when requesting the above URL. Defaults to POST.

MoveConnectedCallLeg (deprecated, see ChildCallMode)

If True, Restcomm will move both call legs to the new URL

ChildCallMode

It can take one of the three values below:

* Hangup: Restcomm will hang up the child call if the parent call is modified through Live Call Modification. This is the default behavior and equivalent to the current behavior of MoveConnectedLeg=False.

* Move: Restcomm will move the child call to used the same url that was used to modify the parent call. This is equivalent to the current behavior of MoveConnectedLeg=True.

* StayConnected: All call legs will still continue to stay connected and process an RCML from an existing URL. A call leg with CallSid will start interpreting a new RCML from a newly provided URL in a parallel mode. When this new RCML that is running in parallel is over, this will not terminate the call leg unlike the existing RCML does. The call legs will be terminated either after a SIP BYE from a peer is sent, when the RCML from the existing URL is over, or when any RCML contains a "<Hangup>" verb.

The MoveConnectedCallLeg parameter is deprecated!

The MoveConnectedCallLeg parameter in LCM has been marked as deprecated and will be discontinued in the future!

Users shall use the new ChildCallMode parameter instead.

Description

Prerequisite for the Live Call Modification API is to know the CallSid of the call. The CallSid is generated by Restcomm for every incoming or outgoing call. When we create an outgoing call using the Calls REST API, Restcomm will generate the CallSid and the response will contain the CallSid. For an Incoming call, Restcomm will generate the CallSid, and will include it in the parameters of the GET or POST request to download the RCML from the application server.So the application server, will get the CallSid for this incoming call and can store it for later use.

Steps for an incoming call are the following:

New incoming call to Restcomm
Restcomm generates CallSid and other parameters for this call
Restcomm prepares GET/POST request and attaches the previously prepared parameters
Restcomm sends the GET/POST request to the URL assigned to the DID called
Application server receives the GET/POST request
Application server should store the CallSid along with the rest of the parameters for later use
Application server prepares the response with the appropriate RCML for the given DID and send it back to Restcomm to process it

Given that we have the CallSid available, the next step to modify a live call is to prepare the new POST request to Restcomm with the URL of the new destination application.

Lets assume that initially the Application server prepared an RCML that will connect the incoming call to Bob and that later Bob wants this call to be transferred to Alice. Application Server will have to prepare a new RCML that will dial to Alice, and using the Live Call Modification API, will ask Restcomm to process this new RCML for the incoming call and thus will connect it to Alice.

Here are the steps:

Incoming call - CallSid (1234567890)
Applcation server: - Store CallSid and other parameters - Prepare and send RCML that connects the call to Bob (using Dial verb)
Restcomm process the given RCML and connects incoming call to Bob
Bob wants to transfer the call to Alice and sends the request to Controller (application server)
Application server: - Prepares new RCML with a given URL: http://app.server/CallToAlice that using Dial will dial to Alice - Uses Live Call Modification prepares a new POST request: \https://$DOMAIN/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls/YOUR_CALL_SID - in the POST requests adds the following parameters: Url=http://app.server/CallToAlice
Restcomm process this Live Call Modification request and redirects the incoming call to the new RCML application (to the new URL)
Eventually the incoming call will be connected to Alice.

Similar, application server can change an incoming call to Bob to a conference call where more participants can be added later.Given that application server already knows the CallSid for the incoming call to Bob

Will prepare a new RCML for the Dial Conference
Will prepare new POST Live Call Modification request for the incoming call to be connected to the new url (that will dial to the conference)
Will then prepare new outgoing call request, using the Calls Rest API that will connect Bob to the conference application URL: - \https://$DOMAIN/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls` - will pass the following parameters: From=INCOMING_CALL_ID To=client:bob Url=CONFERENCE_APPLICATION_URL
Later application server can create more outgoing call requests, similar to the one above, to invite other clients or sip URLs or PSTN numbers to this conference call

Examples

Redirect Call to a new RCML

Live Call Modification POST request example:

curl -X POST https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls/CALL_SID.json  \
   -d 'Url=http://mycompany.com/restcomm/demos/dialalice.xml' \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';
// Provide additional path parameters if applicable
const CALL_SID = 'my_CALL_SID'

request.({
      method: 'POST',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls/' + CALL_SID + '.json',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN },
      form: {
         'Url': 'http://mycompany.com/restcomm/demos/dialalice.xml'
      }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
});

from http.client import HTTPSConnection
from base64 import b64encode
from urllib.parse import urlencode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'
// Provide additional path parameters if applicable
CALL_SID = 'my_CALL_SID'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass,
    'Content-type': 'application/x-www-form-urlencoded',
    'Accept': 'text/plain' }

# Update POST parameters accordingly
params = urlencode({
   'Url': 'http://mycompany.com/restcomm/demos/dialalice.xml'
})

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("POST", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls/' + CALL_SID + '.json',
      params, headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";
   // Provide additional path parameters if applicable
   public static final String CALL_SID = "my_CALL_SID"

   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL(("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Calls/" + CALL_SID + ".json");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("POST");
      conn.setDoOutput(true);
      DataOutputStream os = new DataOutputStream(conn.getOutputStream());

      // Update POST parameters accordingly
      os.writeBytes("Url=http://mycompany.com/restcomm/demos/dialalice.xml");
      os.close();

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

Redirect Call to a new RCML and connect both call legs

curl -X POST https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls/CALL_SID.json  \
   -d 'Url=http://mycompany.com/restcomm/demos/conference.xml' \
   -d 'MoveConnectedCallLeg=true' \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';
// Provide additional path parameters if applicable
const CALL_SID = 'my_CALL_SID'

request.({
      method: 'POST',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls/' + CALL_SID + '.json',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN },
      form: {
         'Url': 'http://mycompany.com/restcomm/demos/conference.xml',
         'MoveConnectedCallLeg': 'true'
      }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
});

from http.client import HTTPSConnection
from base64 import b64encode
from urllib.parse import urlencode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'
// Provide additional path parameters if applicable
CALL_SID = 'my_CALL_SID'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass,
    'Content-type': 'application/x-www-form-urlencoded',
    'Accept': 'text/plain' }

# Update POST parameters accordingly
params = urlencode({
   'Url': 'http://mycompany.com/restcomm/demos/conference.xml',
   'MoveConnectedCallLeg': 'true'
})

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("POST", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls/' + CALL_SID + '.json',
      params, headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";
   // Provide additional path parameters if applicable
   public static final String CALL_SID = "my_CALL_SID"

   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL(("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Calls/" + CALL_SID + ".json");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("POST");
      conn.setDoOutput(true);
      DataOutputStream os = new DataOutputStream(conn.getOutputStream());

      // Update POST parameters accordingly
      os.writeBytes("Url=http://mycompany.com/restcomm/demos/conference.xml&" +
        "MoveConnectedCallLeg=true");
      os.close();

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

Terminate In Progress call

curl -X POST https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls/CALL_SID.json  \
   -d 'Status=completed' \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';
// Provide additional path parameters if applicable
const CALL_SID = 'my_CALL_SID'

request.({
      method: 'POST',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls/' + CALL_SID + '.json',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN },
      form: {
         'Status': 'completed'
      }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
});

from http.client import HTTPSConnection
from base64 import b64encode
from urllib.parse import urlencode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'
// Provide additional path parameters if applicable
CALL_SID = 'my_CALL_SID'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass,
    'Content-type': 'application/x-www-form-urlencoded',
    'Accept': 'text/plain' }

# Update POST parameters accordingly
params = urlencode({
   'Status': 'completed'
})

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("POST", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls/' + CALL_SID + '.json',
      params, headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";
   // Provide additional path parameters if applicable
   public static final String CALL_SID = "my_CALL_SID"

   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL(("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Calls/" + CALL_SID + ".json");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("POST");
      conn.setDoOutput(true);
      DataOutputStream os = new DataOutputStream(conn.getOutputStream());

      // Update POST parameters accordingly
      os.writeBytes("Status=completed");
      os.close();

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

Terminate Ringing call

curl -X POST https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls/CALL_SID.json  \
   -d 'Status=canceled' \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';
// Provide additional path parameters if applicable
const CALL_SID = 'my_CALL_SID'

request.({
      method: 'POST',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls/' + CALL_SID + '.json',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN },
      form: {
         'Status': 'canceled'
      }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
});

from http.client import HTTPSConnection
from base64 import b64encode
from urllib.parse import urlencode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'
// Provide additional path parameters if applicable
CALL_SID = 'my_CALL_SID'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass,
    'Content-type': 'application/x-www-form-urlencoded',
    'Accept': 'text/plain' }

# Update POST parameters accordingly
params = urlencode({
   'Status': 'canceled'
})

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("POST", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls/' + CALL_SID + '.json',
      params, headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";
   // Provide additional path parameters if applicable
   public static final String CALL_SID = "my_CALL_SID"

   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL(("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Calls/" + CALL_SID + ".json");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("POST");
      conn.setDoOutput(true);
      DataOutputStream os = new DataOutputStream(conn.getOutputStream());

      // Update POST parameters accordingly
      os.writeBytes("Status=canceled");
      os.close();

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

Modifying Live Calls - Example

In order to accomplish this, you need to create a client called alice
Start a SIP phone and register alice
From the terminal run the following curl command
Make sure alice is using the port 5061
The "From=" could be any number of your choice
The Url is the default sample example provided with Restcomm

Modifying a Live Call

curl -X POST https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls.json  \
   -d 'From=+16175551212' \
   -d 'To=sip:alice@mycompany.com' \
   -d 'Url=https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml' \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';

request.({
      method: 'POST',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN },
      form: {
         'From': '+16175551212',
         'To': 'sip:alice@mycompany.com',
         'Url': 'https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml'
      }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
});

from http.client import HTTPSConnection
from base64 import b64encode
from urllib.parse import urlencode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass,
    'Content-type': 'application/x-www-form-urlencoded',
    'Accept': 'text/plain' }

# Update POST parameters accordingly
params = urlencode({
   'From': '+16175551212',
   'To': 'sip:alice@mycompany.com',
   'Url': 'https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml'
})

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("POST", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json',
      params, headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";


   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL(("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Calls.json");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("POST");
      conn.setDoOutput(true);
      DataOutputStream os = new DataOutputStream(conn.getOutputStream());

      // Update POST parameters accordingly
      os.writeBytes("From=+16175551212&" +
        "To=sip:alice@mycompany.com&" +
        "Url=https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml");
      os.close();

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

You will see an output similar to the one below:

{
  "sid": "CAfa51b104354440b09213d04752f50271",
  "date_created": "2013-11-01T03:41:14.488-06:00",
  "date_updated": "2013-11-01T03:41:14.488-06:00",
  "account_sid": "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
  "to": "alice",
  "from": "+16175551212",
  "status": "queued",
  "start_time": "2013-11-01T03:41:14.488-06:00",
  "direction": "outbound-api",
  "api_version": "2012-04-24",
  "uri": "/2012-04-24/Accounts/ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Calls/CAfa51b104354440b09213d04752f50271.json",
  "subresource_uris": {
    "notifications": "/restcomm/2012-04-24/Accounts/ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Calls/CAfa51b104354440b09213d04752f50271/Notifications",
    "recordings": "/restcomm/2012-04-24/Accounts/ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Calls/CAfa51b104354440b09213d04752f50271/Recordings"
  }
}

Notice the "sid": "CAfa51b104354440b09213d04752f50271", This Call ID is what you must use to interact with the current call. You can now redirect the current call to another application as shown below Notice that the Call ID is referenced The call will now be redirected to the Url specified(hello-world.xml)

curl -X POST https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls/CALL_SID.json  \
   -d 'From=+16175551212' \
   -d 'To=sip:alice@mycompany.com' \
   -d 'Url=https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml' \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';
// Provide additional path parameters if applicable
const CALL_SID = 'my_CALL_SID'

request.({
      method: 'POST',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls/' + CALL_SID + '.json',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN },
      form: {
         'From': '+16175551212',
         'To': 'sip:alice@mycompany.com',
         'Url': 'https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml'
      }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
});

from http.client import HTTPSConnection
from base64 import b64encode
from urllib.parse import urlencode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'
// Provide additional path parameters if applicable
CALL_SID = 'my_CALL_SID'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass,
    'Content-type': 'application/x-www-form-urlencoded',
    'Accept': 'text/plain' }

# Update POST parameters accordingly
params = urlencode({
   'From': '+16175551212',
   'To': 'sip:alice@mycompany.com',
   'Url': 'https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml'
})

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("POST", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls/' + CALL_SID + '.json',
      params, headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";
   // Provide additional path parameters if applicable
   public static final String CALL_SID = "my_CALL_SID"

   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL(("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Calls/" + CALL_SID + ".json");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("POST");
      conn.setDoOutput(true);
      DataOutputStream os = new DataOutputStream(conn.getOutputStream());

      // Update POST parameters accordingly
      os.writeBytes("From=+16175551212&" +
        "To=sip:alice@mycompany.com&" +
        "Url=https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml");
      os.close();

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

You can still redirect the current call back to the previous application

curl -X POST https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls/CALL_SID.json  \
   -d 'Url=https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml' \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';
// Provide additional path parameters if applicable
const CALL_SID = 'my_CALL_SID'

request.({
      method: 'POST',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls/' + CALL_SID + '.json',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN },
      form: {
         'Url': 'https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml'
      }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
});

from http.client import HTTPSConnection
from base64 import b64encode
from urllib.parse import urlencode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'
// Provide additional path parameters if applicable
CALL_SID = 'my_CALL_SID'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass,
    'Content-type': 'application/x-www-form-urlencoded',
    'Accept': 'text/plain' }

# Update POST parameters accordingly
params = urlencode({
   'Url': 'https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml'
})

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("POST", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls/' + CALL_SID + '.json',
      params, headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";
   // Provide additional path parameters if applicable
   public static final String CALL_SID = "my_CALL_SID"

   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL(("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Calls/" + CALL_SID + ".json");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("POST");
      conn.setDoOutput(true);
      DataOutputStream os = new DataOutputStream(conn.getOutputStream());

      // Update POST parameters accordingly
      os.writeBytes("Url=https://ACCOUNT_SID:AUTH_TOKEN@mycompany.com/restcomm/demos/hello-play.xml");
      os.close();

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

You can end the call using the Status=completed command as shown below

curl -X POST https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls/CALL_SID.json  \
   -d 'Status=completed' \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';
// Provide additional path parameters if applicable
const CALL_SID = 'my_CALL_SID'

request.({
      method: 'POST',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls/' + CALL_SID + '.json',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN },
      form: {
         'Status': 'completed'
      }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
});

from http.client import HTTPSConnection
from base64 import b64encode
from urllib.parse import urlencode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'
// Provide additional path parameters if applicable
CALL_SID = 'my_CALL_SID'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass,
    'Content-type': 'application/x-www-form-urlencoded',
    'Accept': 'text/plain' }

# Update POST parameters accordingly
params = urlencode({
   'Status': 'completed'
})

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("POST", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls/' + CALL_SID + '.json',
      params, headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";
   // Provide additional path parameters if applicable
   public static final String CALL_SID = "my_CALL_SID"

   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL(("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Calls/" + CALL_SID + ".json");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("POST");
      conn.setDoOutput(true);
      DataOutputStream os = new DataOutputStream(conn.getOutputStream());

      // Update POST parameters accordingly
      os.writeBytes("Status=completed");
      os.close();

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

You can Mute/unMute an inprogress call as shown bellow.

curl -X POST https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Conferences/CONFERENCE_SID/Participants/CALL_SID.json  \
   -d 'Mute=true' \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';
// Provide additional path parameters if applicable
const CONFERENCE_SID = 'my_CONFERENCE_SID'
const CALL_SID = 'my_CALL_SID'

request.({
      method: 'POST',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Conferences/' + CONFERENCE_SID + '/Participants/' + CALL_SID + '.json',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN },
      form: {
         'Mute': 'true'
      }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
});

from http.client import HTTPSConnection
from base64 import b64encode
from urllib.parse import urlencode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'
// Provide additional path parameters if applicable
CONFERENCE_SID = 'my_CONFERENCE_SID'
CALL_SID = 'my_CALL_SID'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass,
    'Content-type': 'application/x-www-form-urlencoded',
    'Accept': 'text/plain' }

# Update POST parameters accordingly
params = urlencode({
   'Mute': 'true'
})

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("POST", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Conferences/' + CONFERENCE_SID + '/Participants/' + CALL_SID + '.json',
      params, headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";
   // Provide additional path parameters if applicable
   public static final String CONFERENCE_SID = "my_CONFERENCE_SID"
   public static final String CALL_SID = "my_CALL_SID"

   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL(("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Conferences/" + CONFERENCE_SID + "/Participants/" + CALL_SID + ".json");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("POST");
      conn.setDoOutput(true);
      DataOutputStream os = new DataOutputStream(conn.getOutputStream());

      // Update POST parameters accordingly
      os.writeBytes("Mute=true");
      os.close();

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

curl -X POST https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Conferences/CONFERENCE_SID/Participants/CALL_SID.json  \
   -d 'Mute=false' \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';
// Provide additional path parameters if applicable
const CONFERENCE_SID = 'my_CONFERENCE_SID'
const CALL_SID = 'my_CALL_SID'

request.({
      method: 'POST',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Conferences/' + CONFERENCE_SID + '/Participants/' + CALL_SID + '.json',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN },
      form: {
         'Mute': 'false'
      }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
});

from http.client import HTTPSConnection
from base64 import b64encode
from urllib.parse import urlencode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'
// Provide additional path parameters if applicable
CONFERENCE_SID = 'my_CONFERENCE_SID'
CALL_SID = 'my_CALL_SID'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass,
    'Content-type': 'application/x-www-form-urlencoded',
    'Accept': 'text/plain' }

# Update POST parameters accordingly
params = urlencode({
   'Mute': 'false'
})

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("POST", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Conferences/' + CONFERENCE_SID + '/Participants/' + CALL_SID + '.json',
      params, headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";
   // Provide additional path parameters if applicable
   public static final String CONFERENCE_SID = "my_CONFERENCE_SID"
   public static final String CALL_SID = "my_CALL_SID"

   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL(("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Conferences/" + CONFERENCE_SID + "/Participants/" + CALL_SID + ".json");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("POST");
      conn.setDoOutput(true);
      DataOutputStream os = new DataOutputStream(conn.getOutputStream());

      // Update POST parameters accordingly
      os.writeBytes("Mute=false");
      os.close();

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

List Filter

HTTP GET.The following GET query string parameters allow you to limit the list returned.Note, parameters are case-sensitive:

Request Parameters

Parameter Description

Parameter	Description
To	Only show calls to this phone number or Client identifier.
From	Only show calls from this phone number or Client identifier.
Status	Only show calls currently in this status. May be queued, ringing, in-progress, canceled, completed, failed, busy, or no-answer.
StartTime	Only show calls that started on this date/time or later, given as an ISO-8601 date/time string, like `YYYY-MM-DDTHH:MM:SS` (for example `2018-10-05T22:45:32`) or, if you want to omit the time, YYYY-MM-DD (for example `2018-10-05`). When only a date is provided the time is assumed to be at midnight of the given date. Note that the given date/time is inclusive and is assumed to be in UTC timezone.
EndTime	Only show calls that ended on this date/time or earlier, given as an ISO-8601 date/time string, like `YYYY-MM-DDTHH:MM:SS` (for example `2018-10-06T02:10:03`) or, if you want to omit the time, YYYY-MM-DD (for example `2018-10-06`). When only a date is provided the time is assumed to be at midnight of the given date. Note that the given date/time is inclusive and is assumed to be in UTC timezone.
ParentCallSid	Only show calls spawned by the call with this Sid.

Only show calls to this phone number or Client identifier.

From

Only show calls from this phone number or Client identifier.

Status

Only show calls currently in this status. May be queued, ringing, in-progress, canceled, completed, failed, busy, or no-answer.

StartTime

Only show calls that started on this date/time or later, given as an ISO-8601 date/time string, like YYYY-MM-DDTHH:MM:SS (for example 2018-10-05T22:45:32) or, if you want to omit the time, YYYY-MM-DD (for example 2018-10-05). When only a date is provided the time is assumed to be at midnight of the given date. Note that the given date/time is inclusive and is assumed to be in UTC timezone.

EndTime

Only show calls that ended on this date/time or earlier, given as an ISO-8601 date/time string, like YYYY-MM-DDTHH:MM:SS (for example 2018-10-06T02:10:03) or, if you want to omit the time, YYYY-MM-DD (for example 2018-10-06). When only a date is provided the time is assumed to be at midnight of the given date. Note that the given date/time is inclusive and is assumed to be in UTC timezone.

ParentCallSid

Only show calls spawned by the call with this Sid.

Filter using the From parameter

The example below will only return Calls made from client Alice

curl -X GET https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls.json?From=Jane  \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';

request({
      method: 'GET',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json?From=Jane',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
   }
);

from http.client import HTTPSConnection
from base64 import b64encode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass }

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("GET", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json?From=Jane',
      headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";


   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Calls.json?From=Jane");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("GET");

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

The result will be similar to the one below

{
  "page": 0,
  "num_pages": 0,
  "page_size": 50,
  "total": 3,
  "limit": 10000,
  "start": "0",
  "end": "3",
  "uri": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls",
  "first_page_uri": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls?Page=0&PageSize=50&Limit=10000",
  "previous_page_uri": "null",
  "next_page_uri": "null",
  "last_page_uri": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls?Page=0&PageSize=50&Limit=10000",
  "calls": [
    {
      "sid": "IDd3ae1cc61f6c4a03be0cc4e4c89f3f50-CA0ae517906fecddfe264e95094f78f9fe@sip.nexmo.com",
      "InstanceId": "IDd3ae1cc61f6c4a03be0cc4e4c89f3f50",
      "date_created": "Tue, 7 Apr 2020 11:10:15 +0000",
      "date_updated": "Tue, 7 Apr 2020 11:10:26 +0000",
      "account_sid": "AC61148eb9d61281750ccc0e13c6094fe1",
      "to": "12012993898",
      "from": "Jane",
      "phone_number_sid": "AC61148eb9d61281750ccc0e13c6094fe1",
      "status": "completed",
      "start_time": "2020-04-07T11:10:15.000Z",
      "end_time": "2020-04-07T11:10:26.000Z",
      "duration": 10,
      "direction": "inbound",
      "api_version": "2012-04-24",
      "caller_name": "Jane",
      "uri": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls/IDd3ae1cc61f6c4a03be0cc4e4c89f3f50-CA0ae517906fecddfe264e95094f78f9fe@sip.nexmo.com.json",
      "subresource_uris": {
        "notifications": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls/IDd3ae1cc61f6c4a03be0cc4e4c89f3f50-CA0ae517906fecddfe264e95094f78f9fe@sip.nexmo.com/Notifications.json",
        "recordings": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls/IDd3ae1cc61f6c4a03be0cc4e4c89f3f50-CA0ae517906fecddfe264e95094f78f9fe@sip.nexmo.com/Recordings.json"
      }
    },
    {
      "sid": "ID308543a39dfd49b7a7231df9622763d8-CA7f995ee40d8a43074d57da0154458a14@sip.nexmo.com",
      "InstanceId": "ID308543a39dfd49b7a7231df9622763d8",
      "date_created": "Tue, 7 Apr 2020 11:08:48 +0000",
      "date_updated": "Tue, 7 Apr 2020 11:09:00 +0000",
      "account_sid": "AC61148eb9d61281750ccc0e13c6094fe1",
      "to": "12012993898",
      "from": "Jane",
      "phone_number_sid": "AC61148eb9d61281750ccc0e13c6094fe1",
      "status": "completed",
      "start_time": "2020-04-07T11:08:48.000Z",
      "end_time": "2020-04-07T11:09:00.000Z",
      "duration": 11,
      "direction": "inbound",
      "api_version": "2012-04-24",
      "caller_name": "Jane",
      "uri": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls/ID308543a39dfd49b7a7231df9622763d8-CA7f995ee40d8a43074d57da0154458a14@sip.nexmo.com.json",
      "subresource_uris": {
        "notifications": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls/ID308543a39dfd49b7a7231df9622763d8-CA7f995ee40d8a43074d57da0154458a14@sip.nexmo.com/Notifications.json",
        "recordings": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls/ID308543a39dfd49b7a7231df9622763d8-CA7f995ee40d8a43074d57da0154458a14@sip.nexmo.com/Recordings.json"
      }
    },
    {
      "sid": "ID248a2ae179cc490a9b5eb892af609ce8-CA0dac2985006971c722ab398103a34a4f@sip.nexmo.com",
      "InstanceId": "ID248a2ae179cc490a9b5eb892af609ce8",
      "date_created": "Mon, 6 Apr 2020 21:33:39 +0000",
      "date_updated": "Mon, 6 Apr 2020 21:34:12 +0000",
      "account_sid": "AC61148eb9d61281750ccc0e13c6094fe1",
      "to": "16502636146",
      "from": "Jane",
      "phone_number_sid": "AC61148eb9d61281750ccc0e13c6094fe1",
      "status": "completed",
      "start_time": "2020-04-06T21:33:39.000Z",
      "end_time": "2020-04-06T21:34:12.000Z",
      "duration": 33,
      "direction": "inbound",
      "api_version": "2012-04-24",
      "caller_name": "Jane",
      "uri": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls/ID248a2ae179cc490a9b5eb892af609ce8-CA0dac2985006971c722ab398103a34a4f@sip.nexmo.com.json",
      "subresource_uris": {
        "notifications": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls/ID248a2ae179cc490a9b5eb892af609ce8-CA0dac2985006971c722ab398103a34a4f@sip.nexmo.com/Notifications.json",
        "recordings": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls/ID248a2ae179cc490a9b5eb892af609ce8-CA0dac2985006971c722ab398103a34a4f@sip.nexmo.com/Recordings.json"
      }
    }
  ]
}

Paging Information

HTTP GET. The following GET query string parameters allow you to limit the list returned.Note, parameters are case-sensitive:

Request Parameters

Parameter	Description
Page	The current page number.Zero-indexed, so the first page is 0.
PageSize	How many items are in each page
Limit	The total number of items in the list.
StartTime	The position in the overall list of the first item in this page.
EndTime	The position in the overall list of the last item in this page.
CallSid	The Call sid of the resource.

Parameter

Description

Page

The current page number.Zero-indexed, so the first page is 0.

PageSize

How many items are in each page

Limit

The total number of items in the list.

StartTime

The position in the overall list of the first item in this page.

EndTime

The position in the overall list of the last item in this page.

CallSid

The Call sid of the resource.

Example.

The command below will return a single item from the list of calls using the PageSize parameter

curl -X GET https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls.json?PageSize=1  \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';

request({
      method: 'GET',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json?PageSize=1',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
   }
);

from http.client import HTTPSConnection
from base64 import b64encode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass }

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("GET", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json?PageSize=1',
      headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";


   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Calls.json?PageSize=1");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("GET");

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

The result of the PageSize parameter

{
  "page": 0,
  "num_pages": 75,
  "page_size": 1,
  "total": 75,
  "limit": 10000,
  "start": "0",
  "end": "0",
  "uri": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls",
  "first_page_uri": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls?Page=0&PageSize=1&Limit=10000",
  "previous_page_uri": "null",
  "next_page_uri": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls?Page=1&PageSize=1&AfterSid=IDd3ae1cc61f6c4a03be0cc4e4c89f3f50-CA0ae517906fecddfe264e95094f78f9fe@sip.nexmo.com&Limit=10000",
  "last_page_uri": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls?Page=75&PageSize=1&Limit=10000",
  "calls": [
    {
      "sid": "IDd3ae1cc61f6c4a03be0cc4e4c89f3f50-CA0ae517906fecddfe264e95094f78f9fe@sip.nexmo.com",
      "InstanceId": "IDd3ae1cc61f6c4a03be0cc4e4c89f3f50",
      "date_created": "Tue, 7 Apr 2020 11:10:15 +0000",
      "date_updated": "Tue, 7 Apr 2020 11:10:26 +0000",
      "account_sid": "AC61148eb9d61281750ccc0e13c6094fe1",
      "to": "12012993898",
      "from": "Jane",
      "phone_number_sid": "AC61148eb9d61281750ccc0e13c6094fe1",
      "status": "completed",
      "start_time": "2020-04-07T11:10:15.000Z",
      "end_time": "2020-04-07T11:10:26.000Z",
      "duration": 10,
      "direction": "inbound",
      "api_version": "2012-04-24",
      "caller_name": "Jane",
      "uri": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls/IDd3ae1cc61f6c4a03be0cc4e4c89f3f50-CA0ae517906fecddfe264e95094f78f9fe@sip.nexmo.com.json",
      "subresource_uris": {
        "notifications": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls/IDd3ae1cc61f6c4a03be0cc4e4c89f3f50-CA0ae517906fecddfe264e95094f78f9fe@sip.nexmo.com/Notifications.json",
        "recordings": "/2012-04-24/Accounts/AC61148eb9d61281750ccc0e13c6094fe1/Calls/IDd3ae1cc61f6c4a03be0cc4e4c89f3f50-CA0ae517906fecddfe264e95094f78f9fe@sip.nexmo.com/Recordings.json"
      }
    }
  ]
}

The command below uses Limit parameter to return a list of 500 records in total.

curl -X GET https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls.json?PageSize=10&Limit=500  \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';

request({
      method: 'GET',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json?PageSize=10&Limit=500',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
   }
);

from http.client import HTTPSConnection
from base64 import b64encode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass }

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("GET", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json?PageSize=10&Limit=500',
      headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";


   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Calls.json?PageSize=10&Limit=500");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("GET");

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

The result of the Limit parameter can be seen below.

{
  "page": 0,
  "num_pages": 44,
  "page_size": 10,
  "total": 442,
  "limit": 500,
  "start": "0",
  "end": "9",
  "uri": "/2012-04-24/Accounts/ACae6e420f425248d6a26948c17a9e2acf/Calls",
  "first_page_uri": "/2012-04-24/Accounts/ACae6e420f425248d6a26948c17a9e2acf/Calls?Page=0&PageSize=10&Limit=500",
  "previous_page_uri": "null",
  "next_page_uri": "/2012-04-24/Accounts/ACae6e420f425248d6a26948c17a9e2acf/Calls?Page=1&PageSize=10&AfterSid=CA79805ad182e148799cb2b6fb9381a674&Limit=500",
  "last_page_uri": "/2012-04-24/Accounts/ACae6e420f425248d6a26948c17a9e2acf/Calls?Page=44&PageSize=10&Limit=500",
  "calls": [
        ...
  ]
}

Additional Paging Information

The API returns URIs to the next, previous, first and last pages of the returned list as shown in the table below:

Request Parameters

Parameter	Description
Uri	The URI of the current page.
Firstpageuri	The URI for the first page of this list.
Nextpageuri	The URI for the next page of this list.
Previouspageuri	The URI for the previous page of this list.
Lastpageuri	The URI for the last page of this list.

Parameter

Description

Uri

The URI of the current page.

Firstpageuri

The URI for the first page of this list.

Nextpageuri

The URI for the next page of this list.

Previouspageuri

The URI for the previous page of this list.

Lastpageuri

The URI for the last page of this list.

Sorting Information

HTTP GET. You can use the SortBy GET query parameter to determine which attribute you want to sort by and in which direction; direction can either be 'asc' for ascending and 'desc' for descending sort ordering. Here’s the overall format: SortBy=<sorting attribute>:<direction>. If no direction parameter is provided, then the listing of calls is sorted by the attribute in ascending order. Below you can find the possible attributes you can sort by:

SortBy Attributes

Parameter	Description
DateCreated	Sort by date at which the call was created
From	Sort by the party who initiated the call
To	Sort by the party who received the call
Direction	Sort by the direction of the call
Status	Sort by the status of the call
Duration	Sort by the duration of the call

Parameter

Description

DateCreated

Sort by date at which the call was created

From

Sort by the party who initiated the call

Sort by the party who received the call

Direction

Sort by the direction of the call

Status

Sort by the status of the call

Duration

Sort by the duration of the call

Example

The command below will return calls sorted by the creation date in ascending order using SortBy parameter:

curl -X GET https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/ACCOUNT_SID/Calls.json?SortBy=DateCreated:asc  \
   -u 'YourAccountSid:YourAuthToken'

const request = require('request');

// Provide your Account Sid and Auth Token from your Console Account page
const ACCOUNT_SID = 'my_ACCOUNT_SID';
const AUTH_TOKEN = 'my_AUTH_TOKEN';

request({
      method: 'GET',
      url: 'https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json?SortBy=DateCreated:asc',
      auth: { 'user': ACCOUNT_SID, 'pass': AUTH_TOKEN }
   },
   function (error, response, body) {
      // Add your business logic below; status can be found at 'response.statusCode' and response body at 'body'
      ...
   }
);

from http.client import HTTPSConnection
from base64 import b64encode

# Provide your Account Sid and Auth Token from your Console Account page
ACCOUNT_SID = 'my_ACCOUNT_SID'
AUTH_TOKEN = 'my_AUTH_TOKEN'

userAndPass = b64encode(bytes(ACCOUNT_SID + ':' + AUTH_TOKEN, 'utf-8')).decode("ascii")
headers = { 'Authorization' : 'Basic %s' %  userAndPass }

conn = HTTPSConnection('mycompany.restcomm.com')
conn.request("GET", '/restcomm/2012-04-24/Accounts/' + ACCOUNT_SID + '/Calls.json?SortBy=DateCreated:asc',
      headers=headers)
res = conn.getresponse()

# Add your business logic below; status can be found at 'res.status', reason at 'res.reason' and response body can be retrieved with res.read()
...

import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import java.io.*;
import java.util.Base64;

public class JavaSampleClass {
   // Provide your Account Sid and Auth Token from your Console Account page
   public static final String ACCOUNT_SID = "my_ACCOUNT_SID";
   public static final String AUTH_TOKEN = "my_AUTH_TOKEN";


   public static void main(String[] args) throws Exception {
      String userAndPass = ACCOUNT_SID + ':' + AUTH_TOKEN;
      String encoded = Base64.getEncoder().encodeToString(userAndPass.getBytes());

      URL url = new URL("https://mycompany.restcomm.com/restcomm/2012-04-24/Accounts/" + ACCOUNT_SID + "/Calls.json?SortBy=DateCreated:asc");
      HttpsURLConnection conn = (HttpsURLConnection)url.openConnection();
      conn.setRequestProperty("Authorization", "Basic " + encoded);
      conn.setRequestMethod("GET");

      // Add your business logic below; response code can be obtained from 'conn.getResponseCode()' and input stream from 'conn.getInputStream()'
      ...
  }
}

The result of the SortBy parameter:

{
  "page": 0,
  "num_pages": 1,
  "page_size": 50,
  "total": 75,
  "limit": 10000,
  "start": "0",
  "end": "49",
  "uri": "/2012-04-24/Accounts/ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Calls",
  "first_page_uri": "/2012-04-24/Accounts/ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Calls?Page=0&PageSize=50&Limit=10000",
  "previous_page_uri": "null",
  "next_page_uri": "/2012-04-24/Accounts/ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Calls?Page=1&PageSize=50&AfterSid=ID463178db235c4f5d88dcaa2e93c891ea-CA77a54b061666eabb5cf2cfb56f7552c8@sip.nexmo.com&Limit=10000",
  "last_page_uri": "/2012-04-24/Accounts/ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Calls?Page=1&PageSize=50&Limit=10000",
  "calls": [
    {
      "sid": "IDa721a1e38bc040c08625cb9617968482-CA9a6fe392696d4efcb4c0cc55cb019ee8",
      "InstanceId": "IDa721a1e38bc040c08625cb9617968482",
      "date_created": "Mon, 9 Mar 2020 23:18:12 +0000",
      "date_updated": "Mon, 9 Mar 2020 23:18:28 +0000",
      "account_sid": "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
      "to": "16502636146",
      "from": "13103602085",
      "phone_number_sid": "AC61148eb9d61281750ccc0e13c6094fe1",
      "status": "completed",
      "start_time": "2020-03-09T23:18:12.000Z",
      "end_time": "2020-03-09T23:18:28.000Z",
      "duration": 16,
      "direction": "inbound",
      "api_version": "2012-04-24",
      "caller_name": "HARY B.",
      "uri": "/2012-04-24/Accounts/ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Calls/IDa721a1e38bc040c08625cb9617968482-CA9a6fe392696d4efcb4c0cc55cb019ee8.json",
      "subresource_uris": {
        "notifications": "/2012-04-24/Accounts/ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Calls/IDa721a1e38bc040c08625cb9617968482-CA9a6fe392696d4efcb4c0cc55cb019ee8/Notifications.json",
        "recordings": "/2012-04-24/Accounts/ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Calls/IDa721a1e38bc040c08625cb9617968482-CA9a6fe392696d4efcb4c0cc55cb019ee8/Recordings.json"
      }
    },
    {
      "sid": "ID1f2d67b716b34162954fbfc7d7d50b89-CA8ff8cd0aabc14aef9c764b5807801e85",
      "InstanceId": "ID1f2d67b716b34162954fbfc7d7d50b89",
      "date_created": "Wed, 11 Mar 2020 20:12:46 +0000",
      "date_updated": "Wed, 11 Mar 2020 20:12:47 +0000",
      "account_sid": "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
      "to": "12012993898",
      "from": "12965874120",
      "phone_number_sid": "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
      "status": "completed",
      "start_time": "2020-03-11T20:12:47.000Z",
      "end_time": "2020-03-11T20:12:47.000Z",
      "duration": 0,
      "direction": "inbound",
      "api_version": "2012-04-24",
      "caller_name": "V3111612340000193824",
      "uri": "/2012-04-24/Accounts/ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Calls/ID1f2d67b716b34162954fbfc7d7d50b89-CA8ff8cd0aabc14aef9c764b5807801e85.json",
      "subresource_uris": {
        "notifications": "/2012-04-24/Accounts/ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Calls/ID1f2d67b716b34162954fbfc7d7d50b89-CA8ff8cd0aabc14aef9c764b5807801e85/Notifications.json",
        "recordings": "/2012-04-24/Accounts/ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Calls/ID1f2d67b716b34162954fbfc7d7d50b89-CA8ff8cd0aabc14aef9c764b5807801e85/Recordings.json"
      }
    },
    {
      "sid": "IDfbf7e812e3b44ba7a82a757d5dacca0c-CAb43f9a08c3554739aba0fe05ca04d464",
      "InstanceId": "IDfbf7e812e3b44ba7a82a757d5dacca0c",
      "date_created": "Thu, 12 Mar 2020 15:31:12 +0000",
      "date_updated": "Thu, 12 Mar 2020 15:31:29 +0000",
      "account_sid": "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
      "to": "16502636146",
      "from": "19725464888",
      "phone_number_sid": "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX",
      "status": "completed",
      "start_time": "2020-03-12T15:31:12.000Z",
      "end_time": "2020-03-12T15:31:29.000Z",
      "duration": 16,
      "direction": "inbound",
      "api_version": "2012-04-24",
      "caller_name": "Tommy Cameron",
      "uri": "/2012-04-24/Accounts/ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Calls/IDfbf7e812e3b44ba7a82a757d5dacca0c-CAb43f9a08c3554739aba0fe05ca04d464.json",
      "subresource_uris": {
        "notifications": "/2012-04-24/Accounts/ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Calls/IDfbf7e812e3b44ba7a82a757d5dacca0c-CAb43f9a08c3554739aba0fe05ca04d464/Notifications.json",
        "recordings": "/2012-04-24/Accounts/ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX/Calls/IDfbf7e812e3b44ba7a82a757d5dacca0c-CAb43f9a08c3554739aba0fe05ca04d464/Recordings.json"
      }
    }
  ]
}