Control Unit Planning - AT&T MERLIN LEGEND Reference

Planning

Control Unit Planning

Line Capacity
The 800 CO-BRI module contains eight BRI ports. Each port supports two
MERLIN LEGEND BRI lines for a total of 16 lines per module. This allows
connection of 16 BRI lines from a 5ESS Generic 8 Custom central office at the
local telephone company.
A maximum of five 800 CO-BRI modules can be connected to the system (not to
exceed the system capacity of 80 BRI lines).
Planning Form Instructions — System Form 1, System Planning
1. In the table under "Trunks" in the "Capacity" section, find a module type not
being used, cross through the module type name, and write "800 CO-BRI."
2. Change the information in "Trunks Supported by Module" to 16.
3. Multiply the number of CO-BRI modules by 16, and write the results in the
"Total Lines by Module Type" column.
Module Placement
The 800 CO-BRI modules should be grouped together whenever possible to
save time in system programming.
Because of limitations with the 391A, 391A 1, and 391A2 power supplies,
the number of 800 CO-BRI modules plus 100D modules in a carrier cannot
exceed three per carrier.
Planning Form Instructions — System Form 1, System Planning
1. On the "Control Unit Diagram, write "800 CO-BRI" on the slanted lines at the
top of each slot containing an 800 CO-BRI module.
2. Indicate the type of jack on each 800 CO-BRI module by writing "T" (Trunk)
and the associated logical ID for each of the BRI lines connected to the
CO-BRI module. Keep in mind that each 800 CO-BRI module is assigned 16
logical IDs even though the module has only eight physical jacks.
Control Unit Planning
4-4
800