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IMI 66-064
LINE CONNECTIONS
The common equipment cabinet line terminations are
standard modular plug/jack connections. Each
modular jack (2-6) provides termination for two lines.
Modular jacks 2 and 3 also provide termination for an
auxiliary pair in addition to the two outside lines. CO
line terminations can be at a type 66M-xx connector
block or at individual 6-position modular jacks. Table
3-1 shows the line connection details.
The line cord that is routed between the CO line
termination and the common equipment cabinet
termination should be twisted-pair wiring.
Six-wire twisted pair cable is recommended for wiring
between the CO termination and modular jacks 2 and
3 to provide auxiliary equipment interface wiring. Refer
to page 3-16 for details.
CAUTION
To help ensure that external overvoltage
surges do not damage the system, verify that
gas discharge tubes or similar protection
devices are installed, and properly grounded,
on all connected outside lines.
STATION CONNECTIONS
•
Connections between the common equipment and
the stations for models N0616, N0820, and N1024
are via two type 66M-xx connector blocks which are
cable connected to the common equipment 50-pin
male connectors. Table 3-2a shows the station
connection detais. Station connections for the
model N0308 are via standard modular plug/jack
connections provided on the side of the common
equipment cabinet. These jacks are labeled by
station number. Table 3-2b details these
connections.
•
The maximum distance allowed from the common
equipment to the station when using #24 gauge,
twisted-pair cable is 1500 feet.
NOTE: If spare conductors exist in the cables that are
run between the common equipment 66M-xx
connector blocks and the station jacks, it is a
good practice to connect them to earth ground.
Doing this may help prevent them from
inducing radio frequency and/or AC
interference into the system.
The polarity between the individual wires in a
particular voice or data pair is not critical;
however, do not connect the voice circuits to
the data circuits.
STATION PAIRING
Station ports are paired for both data and overload
protection as follows:
10—11 14—15 18—19 22—23 26—27 30—31
12—13 16—17 20—21 24—25 28—29 32—33
3-4
System Description
CAUTION
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