Gs/Ls-Mlx Module; Line/Trunk And Extension Modules - AT&T MERLIN LEGEND Release 3.1 System Manager's Manual

Components

Line/Trunk and Extension Modules

The line/trunk and extension modules inserted into the control unit have jacks for
connecting CO trunks and system telephone wires to the control unit.
A system with a basic carrier has five slots for modules. Up to two expansion
carriers can be added, each one adding six slots for modules.
The system supports 17 different types of modules that vary in the types of
lines/trunks that they support and the types of telephones or other equipment
that can be connected to them.
The names of the modules identify their capacities and capabilities. The first
digit tells you the number of line/trunk jacks a module supports, while the last
two digits describe the number of extension jacks it supports. Following the
number may be letters that indicate the type of trunk it supports, that is, LS for
loop-start and GS for ground-start ; if the number indicates line/trunk support
and no letters follow, the module supports loop-start trunks. For example, the
408 GS/LS-MLX module provides four line/trunk jacks and eight MLX extension
jacks, and supports ground-start and loop-start trunks (see Figure 2–8).
Figure 2–8. 408 GS/LS-MLX Module
PFT Jack
Line/Trunk
Jacks
Digital (MLX)
Extension
Jacks
408
GS/LS-MLX
2–21
About the System