Avaya CMC1 Installation Manual page 275

CAUTION:
Do not plug the 120A3A into any circuit pack other than a TN464F or TN767E or
TN2464 or TN2313. Do not connect the 120A3A to any interface other than a 700A DS1
loopback jack.
Be sure the DS1 circuit pack is set for 24-channel operation (1.544 Mbps). The 120A3A
does not operate with the 32-channel interface. A switch on the circuit pack or
administration sets this option.
CAUTION:
Always wear an antistatic wrist strap when installing a 120A3A module. Do not touch the
external alarm cable when it is connected to the 120A3A. Static discharge can damage
connector terminals and relays.
1
Unplug the DS1 circuit pack from its slot.
2
Install a 4C retainer in the 50-pin plug associated with the DS1 circuit pack slot.
3
Plug the 120A3A's 25-pair connector directly into the plug associated with the DS1 circuit pack
slot.
4
Secure the 4C retainer around the 120A3A.
5
Attach the supplied H700-383 cable to the 120A3A and to the 700A loopback jack.
This cable is directional. To determine the end that connects to the 120A3A, perform a continuity
test between pins 3 and 7. The end with this continuity is the 120A3A end. The shield is grounded
only at the 120A3A end.
Use the cable provided. If cabling other than that provided with the 120A3A is used, observe the
following guidelines:
•
Use 24-gauge wire that provides individually shielded, twisted pairs for transmit and
receive signals. Use the cable between the network interface and the 120A3A. Ground the
shields of this cable only at the 120A3A end to avoid ground loops.
•
Cabling between the network interface and 120A3A can have no bridge taps.
•
If using standard house riser cable for connections between the network interface and the
120A3A, maintain a 100-pair separation between the receive and transmit twisted pairs.
•
If using standard house riser cable for connections between the network interface and the
120A3A, allow no more than 2 cross connects to 110-type cross connect blocks.
•
Never use quad cable (untwisted two pair telephone cable) in a DS1 line.
NOTE:
Avoid mixing wires of different gauges in a DS1 line.
6
If using external alarm equipment, attach the supplied DW8 cable to the 120A3A and the external
equipment. The maximum length of this cable depends on the alarm equipment.
7
If a TN464F or later is used, make sure the circuit pack is set for 24-channel operation. Set the
switch on the circuit pack as shown in
page 141.
8
From the DS1 circuit-pack form of the system administration console, set the line compensation
field to 0-133 ft (40.6 m).
Installation, Upgrades and Additions for Avaya CMC1 Media Gateways
June 2004
Adding or Removing Hardware
Installing an Integrated Channel Service Unit (ICSU) Module
Figure 70, TN464F/GP and TN2464BP Option Settings, on
275