AT&T MERLIN LEGEND System Reference Manual page 414

Features
Feature Interactions
Automatic Route Selection
Direct Station Selector
Group Calling,
Paging,
Park,
Pools, and
Queued Call Console
Remote Access
Ringing Line
Preference
System Programming
The System Renumber option is used to assign the beginning extension for
the range of 50 or 100 extension numbers assigned to Page buttons on the
DSS. The factory setting is that Page 1 begins with extension 0, Page 2
begins with extension 50, and Page 3 begins with extension 100. Each Page
button can be programmed to begin with any extension number that is a
multiple of 50 within the range of 0-9950.
In the Hybrid/PBX mode, the ARS access code (factory setting is 9) can be
renumbered.
The beginning extension for the range of 50 or 100 extensions represented by
each Page button is assigned by using the System Renumber option from the
System Programming menu. The factory setting is that Page 1 begins with
extension 0, Page 2 begins with extension 50, and Page 3 begins with extension
100.
Extensions for the following can be renumbered: calling groups (the factory-set
extensions are 770-791 and 7920-7929), paging groups (the factory-set
extensions are 793-799), system operator park zones (the factory-set zones are
881-888), pool dial-out codes (the factory-set codes are 70 and 890-899), and
the Listed Directory Number (extension for the QCC queue; the factory-set
extension is 800).
If the system includes DID or dial-in tie trunks, the number assigned to the trunk
can be programmed to reach the Remote Access code. This allows Remote
Access users to call in on the DID or dial-in trunk. The Remote Access code can
be renumbered. The factory-set Remote Access code is 889.
In the Key and Behind Switch modes, the Idle Line Preference code (the factory
setting is 9) can be renumbered.
Change the 2-Digit numbering plan to 3-Digit or Set Up Space.
SysRenumber -> Default Numbering
Renumber individual or groups of stations, calling group extensions, Group
Page extension, pool dial-out codes, system operator park zones, the Listed
Directory Number extension, the Remote Access code, or the ARS access
code, or assign the range of extensions on a DSS.
SysRenumber -> Single or Block
System Numbering 2-365