User`s guide

Allworx Server Administrator’s Guide Version 7.6
1-866-ALLWORX * 585-421-3850 Page 39
www.allworx.com
Revised: 11/22/13
7 Extension Length / Internal Dial Plan
The Extension Length setting configures extensions to be three-digits or four-digits long.
This capability affects other server features and has some limitations discussed below.
The Internal Dial Plan specifies the first digit for user extensions and other PBX functions
such as forwarding calls and accessing outside lines. The Allworx Server Administrator
can configure the dial plan to meet the needs of the customer by:
• Matching extensions to DID numbers.
• Keeping the same extensions prior to the introduction of the Allworx system.
• Changing the PBX outside line access to a digit other than “9” to avoid
accidental 911 calls.
• Both Extension Length and the Internal Dial Plan affect many system features.
Allworx recommends configuring the options early in the installation process.
7.1 Extension Length
7.1.1 Set the Extension Length
The factory configuration of an Allworx server is three-digit extensions and does not
require changes. If using four-digit extensions, Allworx recommends changing the
extension length to four digits before defining any Users, Handsets, or Extensions.
To change the extension length on new systems:
1. Log in to the Allworx server admin page. Navigate to Phone System > Dial Plan.
2. Locate the Internal Extension Length section, and click the Modify link.
3. Change the User and System Extensions to four digits in length.
4. Click Update to save the configuration, and boot any previously configured
handsets.
Note:
Systems part of multi-site networks cannot change the Extension Length.