Routine Maintenance Procedures
555-233-123
5-38 Issue 4 May 2002
11. At the cross-connect field, disconnect outside trunk facilities from the Tie
Trunk ports and mark the disconnected wires for later reconnecting the Tie
Trunk ports back to normal operation. The D Impact Tool (AT-8762) is
required to perform this step.
12. Use jumper wires (DT 24M-Y/BL/R/G and DT 24P-W/BRN) and the D
Impact Tool to connect wiring between the two ports assigned in Step 9 at
the cross-connect field. For example, if the two ports on the Analog Tie
Trunk circuit pack are port 1 and 2, connect the wirings as shown below:
13. Check all wirings to verify good connections between the two test ports.
14. Place a call from one voice terminal to another voice terminal using the Tie
Trunk ports assigned. Dial TAC and extension. For example, if TAC of Tie
Trunk group is 110 and station number is 5012, then dial 110 5012. If the
call cannot be made, either one of these ports could be defective. There
are four ports on TN760B (port 1, 2, 3, and 4), try different combinations to
determine defective ports.
15. If there is a defective port on the circuit pack, try to switch to an unused
port. However, if all ports are normally used, then replace the circuit pack.
16. Disconnect the jumpers between two ports. Then use administration
terminal and trunk printouts to restore all trunk group changes to normal
values.
Table 5-6. Carrier Lead Appearances at 110 Cross-Connect Field
110 Connecting Block
Terminals CO Trunk TN747B Tie Trunk TN760B
1T1T1
2R1R1
3T11
4R11
5E1
Continued on next page
E&M E&M
comp t1 stan t1
E2
M1
M2
E1
R2
R11
T2
T11
R12
R1
T12
T1
2 Port 1 Port
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