---
title: "What is SIP trunk? Definition and Meaning in India | Vyora"
description: "A SIP trunk is an internet-based connection that carries voice calls between a company's phone system and the public telephone network."
canonical_url: "https://www.vyora.ai/glossary/sip-trunk"
---

GLOSSARY · Calling · Updated 27 October 2026

# What is SIP trunk?

A SIP trunk is an internet-based connection that carries voice calls between a company's phone system and the public telephone network.

It replaces physical phone lines with a virtual link provided by a telecom carrier. Voice AI platforms use SIP trunks to place and receive calls on your numbers.

If you want the AI to use your own existing numbers, you typically connect a trunk from your provider to the platform; otherwise the platform supplies numbers for you.

## Common questions

Do I need a SIP trunk to start with an AI voice agent?

Not usually. Many platforms provide ready numbers, and a trunk is needed only to bring your own.

## Related terms

-   [Inbound calling](https://www.vyora.ai/glossary/inbound-calling)
-   [Outbound calling](https://www.vyora.ai/glossary/outbound-calling)
-   [DLT registration](https://www.vyora.ai/glossary/dlt-registration)

Definitions are general information for businesses in India, not legal advice. [All glossary terms](https://www.vyora.ai/glossary) · [Try Vyora free](https://www.vyora.ai/get-started)

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