Specifications
Installation
IMl66-107
Line Connections
The line terminations for the common equipment
cabinet are standard modular plug/jack connections.
Each modular jack provides termination for two lines.
Modular line jacks 1 and 2 also provide termination for
an auxiliary pair in addition to the two outside lines.
The outside line termination can be a type 66M-xx
connector block or individual 6-position modular jacks.
The line cord that is routed between the outside line
termination and the common equipment termination
should be twisted-pair wiring.
Table 3-I
shows the
line connection details for all three of the common
equipment base units.
Figure
3-4 illustrates typical
line connections. The G0406, GO61 6 and G1632
common equipment supports the installation of up to
4, 6, or 16 lines respectively. Add-on expansion
modules are available to expand the line capacity of
the systems.
After you have initially connected a line to a particular
line port and programmed its attributes (or left it with
the system defaulted values), you can reassign the
line and its attributes to a different port by
programming action if you wish. This feature allows
you to make adds, moves, and changes without
relocating the line wiring. Refer to Chapter 4 for the
line to line port reassignment programming details.
Line Grounding
Transient voltage spikes, if induced onto CO or
CENTREX lines, can travel 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 it will also provide some protection to the
common equipment, it should not be relied upon for
total protection. To help ensure that external
overvoltage surges do not damage the system, the
manufacturer recommends that gas discharge tubes,
or similar primary protection devices, be installed and
properly grounded on all lines (a selection of
solid-state protection devices for this purpose is
available from ITW Linx, Elk Grove Village, Illinois
60007).
3-6