---
title: "8x8 SIP Trunking Interface Specification"
slug: "8x8-sip-trunking-interface-specification"
updated: 2026-05-22T19:41:19Z
published: 2026-05-22T19:41:19Z
canonical: "help.8x8.com/8x8-sip-trunking-interface-specification"
stale: true
---

> ## Documentation Index
> Fetch the complete documentation index at: https://help.8x8.com/llms.txt
> Use this file to discover all available pages before exploring further.

# 8x8 SIP Trunking Interface Specification

## Overview

This document outlines the requirements for interoperability with the 8x8 SIP trunking interface and services.

## Download

[](https://cdn.us.document360.io/e3a59e39-abd3-4423-964c-0a4008dc5673/Images/Documentation/SIP_Interface_Spec_trunk.pdf)[8x8 SIP Trunking Interface Specification](https://cdn.us.document360.io/e3a59e39-abd3-4423-964c-0a4008dc5673/Images/Documentation/SIP_Interface_Spec_trunk.pdf)