---
title: "Discussion on \"What Is SIP Trunking? Channels, Sizing and India Rules\" | Hashnode"
description: "Discussion on \"What Is SIP Trunking? Channels, Sizing and India Rules\". A reference for teams connecting a PBX, contact centre platform or voice application to the phone network over IP: signalling vs media, channel sizing, authentication, and the Indian rules that apply"
url: "https://hashnode.com/posts/what-is-sip-trunking/6af417033de599948f6db538"
---

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# [What Is SIP Trunking? Channels, Sizing and India Rules](https://piyuzz.hashnode.dev/what-is-sip-trunking?utm_source=hashnode&utm_medium=feed)

A reference for teams connecting a PBX, contact centre platform or voice application to the phone network over IP: signalling vs media, channel sizing, authentication, and the Indian rules that apply

2d ago · 20 min read · piyuzz.hashnode.dev  
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-   [#sip-trunking](https://hashnode.com/tag/sip-trunking)
-   [#sip](https://hashnode.com/tag/sip)
-   [#voip](https://hashnode.com/tag/voip)
-   [#telephony](https://hashnode.com/tag/telephony)
-   [#voice-ai](https://hashnode.com/tag/voice-ai)

## Written by

[Piyush Sahoo](https://hashnode.com/@piyuzz)

@piyuzz · Bengaluru, India

  
[View profile](https://hashnode.com/@piyuzz)

Founding Member, Vobiz. Writing about AI voice agents on the real phone network.

I'm a Founding Member at Vobiz, telephony for AI voice agents. I write about where voice agents meet the phone network: SIP, phone numbers, latency, echo, barge-in and everything that breaks on real calls but not in browser demos. More at piyushsahoo.me

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