Connecting The System; Connecting The Lines - Comdial DXP Plus Manual

GCA40–130
4

4.1 Connecting The Lines

How to connect Line terminations to the line boards vary depending upon the line board type.
the lines
Terminations for the loop start board are standard modular jack connections. Each
jack on the loop-start board provides termination for two lines. Terminations for
the loop start and the multipurpose boards are through a 50-pin amphenol-type
connector, and the connection for the T1 board is an eight-pin modular jack. The
demarcation point can be a type 66M-xx connector block or individual 6-position
modular jacks. The wiring that you route between the demarcation-point and the
line board termination should be #24 AWG or larger twisted-pair wiring (see
figure 14 for line board connections).
How to protect Transient voltage spikes, if induced onto CO or CENTREX lines, can travel
the lines
through the cable and into the common equipment. The telephone company offers
basic protection against this condition, but it is usually designed to protect the
central office circuits. While this CO or CENTREX service will also provide
some protection to the common equipment, you should not rely upon it for total
protection. To help ensure that external over-voltage surges do not damage the
system, Comdial recommends that you install and properly ground gas discharge
tubes, or similar primary protection devices, on all lines.
Each line board is shipped with a ferrite collar. Bundle the line cables together
and snap the collar around the bundle to provide protection against radio
frequency interference.
28 – Connecting The System

Connecting The System

DXP Plus General Description