api/javascript/telnyx-voice-advanced-javascript/SKILL.md
Advanced call control features including DTMF sending, SIPREC recording, noise suppression, client state, and supervisor controls. This skill provides JavaScript SDK examples.
npx skillsauth add team-telnyx/telnyx-toolkit telnyx-voice-advanced-javascriptInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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npm install telnyx
import Telnyx from 'telnyx';
const client = new Telnyx({
apiKey: process.env['TELNYX_API_KEY'], // This is the default and can be omitted
});
All examples below assume client is already initialized as shown above.
Updates client state
PUT /calls/{call_control_id}/actions/client_state_update — Required: client_state
const response = await client.calls.actions.updateClientState('call_control_id', {
client_state: 'aGF2ZSBhIG5pY2UgZGF5ID1d',
});
console.log(response.data);
Initiate a SIP Refer on a Call Control call.
POST /calls/{call_control_id}/actions/refer — Required: sip_address
const response = await client.calls.actions.refer('call_control_id', {
sip_address: 'sip:[email protected]',
});
console.log(response.data);
Sends DTMF tones from this leg.
POST /calls/{call_control_id}/actions/send_dtmf — Required: digits
const response = await client.calls.actions.sendDtmf('call_control_id', { digits: '1www2WABCDw9' });
console.log(response.data);
Start siprec session to configured in SIPREC connector SRS.
POST /calls/{call_control_id}/actions/siprec_start
const response = await client.calls.actions.startSiprec('call_control_id');
console.log(response.data);
Stop SIPREC session.
POST /calls/{call_control_id}/actions/siprec_stop
const response = await client.calls.actions.stopSiprec('call_control_id');
console.log(response.data);
POST /calls/{call_control_id}/actions/suppression_start
const response = await client.calls.actions.startNoiseSuppression('call_control_id');
console.log(response.data);
POST /calls/{call_control_id}/actions/suppression_stop
const response = await client.calls.actions.stopNoiseSuppression('call_control_id');
console.log(response.data);
Switch the supervisor role for a bridged call.
POST /calls/{call_control_id}/actions/switch_supervisor_role — Required: role
const response = await client.calls.actions.switchSupervisorRole('call_control_id', {
role: 'barge',
});
console.log(response.data);
The following webhook events are sent to your configured webhook URL.
All webhooks include telnyx-timestamp and telnyx-signature-ed25519 headers for verification (Standard Webhooks compatible).
| Event | Description |
|-------|-------------|
| callReferStarted | Call Refer Started |
| callReferCompleted | Call Refer Completed |
| callReferFailed | Call Refer Failed |
| callSiprecStarted | Call Siprec Started |
| callSiprecStopped | Call Siprec Stopped |
| callSiprecFailed | Call Siprec Failed |
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