What is SIP Trunk?
2 min read · Bolcho
A virtual phone line over the internet that connects a voice agent to the public phone network, letting it make and receive real calls.
SIP Trunk explained
A SIP trunk carries calls between your telephony provider and your voice-AI platform using the SIP protocol. It's how a voice agent gets a phone number and reaches real callers, without physical phone lines.
Bolcho supports both managed numbers (buy from Bolcho over Plivo) and bring-your-own SIP, so you can keep your existing carrier and just point the trunk at your agent.
Why it matters for voice AI in India
Understanding sip trunk helps you build voice agents that actually work for Indian callers, genuine languages, low latency, and near-cost pricing. Bolcho is built around exactly these fundamentals.
See it in a real agent
Bolcho handles this for you end-to-end. Start a voice or chat agent free.
Frequently asked questions
What does SIP Trunk mean?
A virtual phone line over the internet that connects a voice agent to the public phone network, letting it make and receive real calls.
Why does sip trunk matter in voice AI?
Bolcho supports both managed numbers (buy from Bolcho over Plivo) and bring-your-own SIP, so you can keep your existing carrier and just point the trunk at your agent.