connectSip

connectSip(params): Promise<Call>

Attempt to connect an existing call to a new outbound SIP call. The two devices will hear each other. You can wait until the new peer is disconnected by calling disconnected.

Parameters

params

objectRequired

Object containing the parameters for connecting the call to a SIP endpoint.

from

stringRequired

The party the call is coming from. Must be a SignalWire number or SIP endpoint that you own.

stringRequired

The party you are attempting to call.

timeout

number

The time, in seconds, the call will ring before it is considered unanswered.

headers

SipHeader[]

Array of SipHeader objects. Must be X- headers only, see example below.

codecs

SipCodec[]

Array of desired codecs in order of preference. Supported values are PCMU, PCMA, OPUS, G729, G722, VP8, H264. Default is parent leg codec(s). See SipCodec.

webrtcMedia

boolean

If true, WebRTC media is negotiated. Default is parent leg setting.

sessionTimeout

number

Non-negative value, in seconds, to use for the SIP Session-Expires header. If 0 or unset, SignalWire will pick the default (typically 600).

maxPricePerMinute

number

The maximum price in USD acceptable for the call to be created. If the rate for the call is greater than this value, the call will not be created. If not set, all calls will be created. Price can have a maximum of four decimal places, i.e. 0.0075.

ringback

VoicePlaylist

Ringback audio to play to the call leg. You can play audio, TTS, silence or ringtone. See VoicePlaylist.

callStateUrl

string

Webhook URL to which SignalWire will send call status change notifications. See the payload specifications under CallState.

callStateEvents

string[]Defaults to ["ended"]

An array of event names to be notified about. Allowed values are created, ringing, answered, and ended.

Returns

Promise<Call>

A promise that resolves to a Call object that you can use to control the new peer. The promise resolves only after the new peer picks up the call.

Example

In this example, we connect a inbound call to a internal SIP endpoint. We play a ringback tone to the inbound call leg while waiting for the SIP endpoint to answer. Once the SIP endpoint answers, we wait for the peer to hangup and then hangup the inbound call.

1 import { SignalWire, Voice} from "@signalwire/realtime-api";
2 
3 const client = await SignalWire({ project: "ProjectID Here", token: "Token Here" })
4 
5 const voiceClient = client.voice;
6 // Ringback tone
7 const ringback = new Voice.Playlist().add(
8   Voice.Playlist.Ringtone({
9     name: "it"
10   })
11 );
12 
13 await voiceClient.listen({
14   topics: ["office"],
15   onCallReceived: async (call) => {
16 
17     // Answer the call
18     call.answer();
19     // Connect the call to the device builder plan
20     let peer = await call.connectSip({
21       // Replace the to and from with valid SIP endpoint domains
22       to: "sip:example@example.sip.signalwire.com",
23       from: `sip:${call.from}@example.sip.signalwire.com`,
24       ringback: ringback
25     });
26 
27     // Listen to peer state changes
28     await peer.listen({
29       onStateChanged: (state) => {
30         console.log("Peer state changed:", state.state);
31       }
32     })
33     // wait for peer to hangup
34     await peer.disconnected();
35     console.log("The peer hungup");
36     // hangup the call
37     call.hangup();
38   }
39 });