Avaya IP Office Phone Manager, Installation Manual, Page: 153 / 411

IP Office Installation Page 152
15-601042 Issue 20b (16 July 2009) IP Office
7.5 Changing Extension Numbers
A new or defaulted IP Office system numbers each extension in sequence, going by module and port order, starting from
201. An extension entry is created in the configuration and also an associated user entry. A similar process occurs when
a new extension expansion module is detected.
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Extension versus User
It is important with IP Office to understand that "extension number" is a user property that belongs to and moves
with the user. For example users can use hot desking to login on another phone and calls to that user's extension
number will then go to that phone (the phone temporarily assumes their extension number and settings) until the
user log off. The Base Extension value set against extensions in the IP Office configuration indicate the default
associated user of the extension, it is not the extension number of that port.
Objective - To change a user's or users' extension number.
Procedure 1: Renumbering all extensions and users
The following process allows all user extension numbers to be shift up or down by a set amount. Any settings linked to
those numbers are adjusted including extension Base Extension settings. It does not affect hunt group extension
numbers.
1. This action alters extension settings and so requires a system reboot when the configuration is sent to the IP
Office.
2. Select Tools | Renumber Extension .
3. Enter the amount by which you want to shift the current extension numbering of extensions and users.
4. Click OK .
5. If the configuration changes are complete, send the configuration back to the IP Office and select appropriate
settings for the reboot.