refer | SignalWire

Transfer a SIP call to an external SIP endpoint using the SIP REFER method. Unlike transfer() which transfers control within RELAY, refer() performs a SIP-level transfer to an external endpoint.

This method emits calling.call.refer events. See Call Events for payload details.

Parameters

device

Record<string, unknown>Required

The target SIP device for the REFER.

device.type

stringRequired

Device type. Typically "sip".

device.params

Record<string, unknown>Required

SIP parameters including uri (the SIP URI to refer to).

statusUrl

string | undefined

URL to receive REFER status webhooks.

Returns

Promise<Record<string, unknown>> — Server response confirming the refer operation.

Example

1 import { RelayClient } from '@signalwire/sdk';
2 
3 const client = new RelayClient({
4   project: process.env.SIGNALWIRE_PROJECT_ID!,
5   token: process.env.SIGNALWIRE_TOKEN!,
6   contexts: ['default']
7 });
8 
9 client.onCall(async (call) => {
10   await call.answer();
11   await call.play([{ type: 'tts', text: 'Transferring to another line.' }]);
12 
13   const result = await call.refer({
14     type: 'sip',
15     params: { uri: 'sip:support@example.com' },
16   });
17   console.log(`SIP REFER result: ${JSON.stringify(result)}`);
18 });
19 
20 await client.run();