Voice Calls
You need: an account with one of the two supported provider stacks. Time: 30 minutes.
It is the channel with the longest configuration of all, because it puts telephony and synthetic voice together.
Initial choices
Voice channel name — internal label.
Provider stack — two combinations:
- Twilio + ElevenLabs
- Telnyx + Vapi.ai
Twilio + ElevenLabs supports both the direct call from the browser and the one with an AI agent, from the web call screen. If you do not already have a relationship with Telnyx, it is the more straightforward choice.
From number — the number the call goes out from.
Default outbound mode — Direct / human-led (calls a person) or AI-powered / agent-led (calls the voice agent). It is only the default: it can be changed per call.
Twilio credentials
Only the fields of the selected telephony provider are needed. For Twilio:
| Field | Format |
|---|---|
| Account SID | starts with AC, 34 characters |
| Auth Token | — |
| API Key | starts with SK, 34 characters |
| API Secret | — |
| TwiML App SID | starts with AP, 34 characters |
The TwiML App Voice Request URL field holds an address you have to set as the Voice Request URL in your TwiML App on Twilio. That is a step to carry out on Twilio, not in Talkzen.
The prefixes (AC, SK, AP) are the quickest way to notice you have pasted the wrong credential: they are three long, similar strings and they are easy to mix up.
Webhook
Webhook URL and Status callback URL, both to be exposed over HTTPS and reachable by the provider.
Before saving use Validate configuration. There is also a Setup instructions section inside the dialog itself.
Calls then flow into Call Logs, and in the Flow Builder there is the Call Agent node.
Did not find the answer? Write to support@talkzen.io and tell us what you were doing and what you expected. If it concerns a conversation, the time and the channel save us a round of questions.