---
title: "Discussion on \"What VoIP Really Is: Packets, Codecs and Delay\" | Hashnode"
description: "Discussion on \"What VoIP Really Is: Packets, Codecs and Delay\". This is a reference-style walkthrough of VoIP: the two planes of a call, the bandwidth arithmetic per codec, delay against ITU-T G.114, and India's 2026 rules, each linked to its source.\nVoIP (Voice o"
url: "https://hashnode.com/posts/what-is-voip/6af23df6b0325a9051cf3217"
---

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# [What VoIP Really Is: Packets, Codecs and Delay](https://piyuzz.hashnode.dev/what-is-voip?utm_source=hashnode&utm_medium=feed)

This is a reference-style walkthrough of VoIP: the two planes of a call, the bandwidth arithmetic per codec, delay against ITU-T G.114, and India's 2026 rules, each linked to its source. VoIP (Voice o

3d ago · 20 min read · piyuzz.hashnode.dev  
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## 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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