Set Up Space Numbering Plan; Lines - AT&T MERLIN LEGEND Key System Planning

Control Unit
0
1
2
3
4
5
6
Main Pool
7
70
8
A
9
Figure 2-5 Set Up Space Numbering Plan
A = 800—Listed Directory Number
B = 889—Remote Access
See the CMS documentation for more
information on reassigning numbers for
CMS agent splits.
Operator Console (not flexible)
Stations
MFMs/7500Bs
7100—7243
7300—7443

Lines

801—880
ARS Access (Hybrid/PBX Mode) /Idle Line Access
As shown in Figure 2-5, the system assigns extension numbers in the 7100 to
7243 range to stations. This makes numbers beginning with 1 through 6
available for use in reassigning extension numbers. These new extensions can
be from one to four digits long. The unshaded areas of the setup space
numbering plan in Figure 2-5 indicate the extension numbers available for
reassignment.
The extension numbers shown for MFMs/7500Bs (7300–7443) are resewed for
station adjuncts connected to an MLX telephone, such as a data terminal
connected through an ISDN 7500B Data Module or an answering machine
connected using an MFM. The extension numbers are reserved whether or not
an adjunct is connected to the telephone.
The actual extension number assigned to the adjunct is the extension number
assigned to the MLX telephone increased by 200. For example, if the extension
number assigned to an MLX telephone is 7125, the extension number assigned
to the adjunct on that telephone is 7325. In this example, a call can be placed to
the telephone by dialing extension 7125 or to the adjunct by dialing extension
7325. If you reassign the extension number of the telephone, the system does
not automatically change the extension number of the MFM or data module.
Note: If your system includes the CMS, it assigns extension numbers to agent
splits.
0
Calling Group
770—791, 7920—7929
Park
881—888
9
Page
793—799
Pools
B
890—899
System Numbering
2-23