---
title: "Setting up Cross-PBX dialing in 8x8 Admin Console"
slug: "setting-up-cross-pbx-dialing-in-8x8-admin-console"
updated: 2026-05-17T17:55:04Z
published: 2026-05-21T21:28:43Z
canonical: "help.8x8.com/setting-up-cross-pbx-dialing-in-8x8-admin-console"
---

> ## 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.

# Setting up Cross-PBX dialing in 8x8 Admin Console

## Objective

Setting up extension-to-extension dialing between PBXs.

> [!NOTE]
> Note
> 
> It is optional to use PBX Dial codes, as cross-site dialing can be used between PBXs.
> 
> [Configure Cross-Site Dialing in Admin Console](/support/docs/configure-cross-site-dialing-in-admin-console)

## Applies To

- Admin Console
- Mulitple PBXs

## Procedure

1. Log in to [**Admin Console**](http://login.8x8.com/).
2. Select **Company**.
3. Locate **List of PBX(s)** at the bottom of the page.
4. Click **Edit** (pencil).
5. In the box that appears, type the desired numerical dialing code.
6. Click **Save**.
7. Repeat steps 4 through 6 for each PBX.

> [!NOTE]
> Note
> 
> All PBX dialing codes within an account must be unique.

### Dialing with PBX Codes

The scenarios below explain how you would dial extension 1001 with a PBX code of 22 on your account.

| Scenario | Dialed Extension |
| --- | --- |
| Within the same PBX | 1001 |
| Between different PBXs | 221001 |
| Between different 8x8 accounts | Not supported, you must use the extensions DID |
| Dial by extension through an auto attendant | 1001 |