AT&T Merlin II Feature Module 2 Data Communications Manual page 18

AUTOMATIC NUMBERING
OF JACKSON LINE AND
STATION MODULES
When you turn the power on at the power supply module, the system scans
the modules from left to right and from bottom to top. As it does so, it
identifies the type of module installed in each slot in the control unit.
Beginning with line 01 and station 01, the system numbers the line jacks and
station jacks from the bottom to the top of each module, and from left to right
Labels for the control unit jacks are provided with the system. The station
jack labels are numbered 01 through 88. The line jack labels are numbered 01
through 56. Once the control unit is assembled and these labels affixed to the
modules, you can teIl at a glance which jacks are for outside lines and which
NOTE: The administrator can assign different numbers to lines and
stations. See "Flexible Numbering" in the MERLIN II 5ystem
If you later replace a module with one of a different type, the system
continues to operate as though the original module were still in place. You
must perform a speciaI administration procedure to change your system's line
and/or station numbers and relabel the jacks accordingly. Refer to Section 3
ldentifying Line and Station Modules 2-7