Twilio
First met in aicp-c3-basecamp-06 · Messaging & telephony
TwilioFirst met in aicp-c3-basecamp-06 · Messaging & telephony
Phone numbers and SIP trunking — the plumbing that connects a voice agent to the actual telephone network.
You need real numbers, especially outside the US, and you don't want to pay a voice platform's resale markup.
Numbers in effectively any country, where voice platforms typically resell US/CA only
SIP trunking connects those numbers to the agent platform
Clients host their own account, so the phone bill and the liability stay theirs
Sells phone numbers by country
Provides SIP trunk configuration to route calls into a voice platform
Doesn't build the agent — it's the line, not the voice on it
Doesn't configure itself; SIP trunk setup is a real step in the build
Underneath the voice-agent platform, owned by whoever should be paying for the calls.
Messaging & telephony
No telephony.
None.
current
retell-ai: numbers and SIP trunk feed Retell; cheaper than its resold numbers
| Session | Coverage | Moment | What happened |
|---|---|---|---|
| Basecamp 6: Voice Agents | explained | 0:51:37 | Preferred telephony provider: buy any country's numbers, SIP trunk setup, cheaper than Retell's resold numbers; clients host their own accounts |