Avaya Definity SI, Maintenance Manual, Page: 2542 / 2968

Maintenance Object Repair Procedures
555-233-123 10-1756 Issue 4 May 2002
Figure 10-97. Tie Trunk Interactions
The number of tests to be implemented for Tie Trunk maintenance depends upon
the TIE-TRK circuit packs involved. The test are as follows:
1. NPE Crosstalk Test—Verifies the switch connection operation of the circuit
pack. It verifies that the trunk circuitry talks only on the selected time slot on
the TDM Bus and that it never crosses over to time slots reserved for other
connections.
2. Loop Around and Conference Circuit Test—Verifies the transmission
operation of the circuit pack. It verifies that signals are transmitted to and
from each port (Loop Around within the port), and it tests the conference
capabilities of all ports.
This test may fail due to noise induced by adjacent electric power lines.
Customers having this problem should resolve it with their local power
company. To temporarily alleviate the alarm caused by the failure of this
test, the test may be disabled from trunk administration test field.
3. Several seizure tests, including the following:
— Tie Trunk Seizure Test (not relevant to the TN439 and TN497 circuit
packs)—Verifies the seizure capabilities of the circuit pack. For wink
start and delay dial outgoing trunks only, (and, for the TN2140
[G3iV2-386] circuit pack, also for continuous-seize-ack and
discontinuous-seize-ack), this test activates the M lead and checks
for a response from the distant end within 10 seconds. For
G3iV1.1-286 or G3iV2-386, this test ABORTS on trunk ports
administered as access endpoints.
TIE
TRUNK
PORT
PBX
TIE
TRUNK
PBX
TIE TRUNK
PORT
CIRCUIT
PACK
CIRCUIT
PACK