Avaya DEFINITY Server R Manual page 519

Installing an Integrated Channel Service Unit (ICSU)
Module
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:
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 TN474F is used, make sure the circuit pack is set for 24-channel
operation. Set the switch on the circuit pack.
8. From the DS1 circuit-pack screen of the system administration console, set
the line compensation field to 0-133 feet (40.6 m).
9. Reset the 120A3A by reseating the DS1 circuit pack.
When you reinsert the DS1 circuit pack after installing a 120A3A CSU the
120A3A resets. The DS1 circuit pack initializes and tests the 120A3A.
When initialization and testing is complete, the green LED goes off. If the
RED indicator is OFF after the test, the ICSU is working.
555-233-115
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.
Avoid mixing wires of different gauges in a DS1 line.
Issue 5 October 2002
7-103