Avaya MCC1 Maintenance Procedures page 385

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 the TN760. 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. If every port is
normally used, then replace the circuit pack.
16 Disconnect the jumpers between two ports. Then use administration terminal and trunk printouts
to restore every trunk-group change to normal values.
Table 90: Carrier lead appearances MDF
110 connecting
block terminals
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Maintenance Procedures
December 2003
CO Trunk TN747 Tie Trunk TN760
T1 T1
R1 R1
T11
R11
E1
M1
T2 T2
R2 R2
T12
R12
E2
M2
T3 T3
R3 R3
T13
R13
E3
M3
T4 T4
R4 R4
T14
R14
E4
M4
T5
Additional maintenance procedures
Analog tie trunk back-to-back testing
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