Avaya Definity SI, Руководство по обслуживанию, Страница: 146 / 2968

Routine Maintenance Procedures
555-233-123 5-42 Issue 4 May 2002
Terminating Trunk Transmission Testing
The Terminating Trunk Transmission (TTT) (noninteractive) feature provides for
extension number access to three tone sequences that can be used for trunk
transmission testing from the far end of the trunks.
The three test types should have extension numbers assigned on the
Maintenance-Related System Parameters Form.
Test Type 100 provides:
1. 5.5 seconds of 1004 Hz tone at 0dB
2. Quiet until disconnect; disconnect is forced after one minute
Test Type 102 provides:
1. 9 seconds of 1004 Hz tone at 0dB
2. 1 second of quiet
3. This cycle is repeated until disconnect; disconnect is forced after 24 hours.
Test Type 105 provides:
1. nine seconds of 1004 Hz at -16dB
2. one second of quiet
3. nine seconds of 404 Hz at -16dB
4. one second of quiet
5. nine seconds of 2804 Hz at -16dB
6. 30 seconds of quiet
7. one half second of Test Progress Tone (2225 Hz)
8. approximately five seconds of quiet
9. forced disconnect
Troubleshooting ISDN-PRI Problems
The following flowchart, Figure 5-6 on page 5-43 and Figure 5-7 on page 5-44 ,
defines a layered approach when troubleshooting ISDN-PRI problems. Since a
problem at a lower layer affects upper layers, layers are investigated from low to
high. In the flowchart, the DS1 facility is layer 1, the TN765 Processor Interface is
layer 2, and the ISDN trunks are layer 3. Transient problems are diagnosed on
Page 2 of the flowchart,
Figure 5-7 on page 5-44 .
Test Type 100:_____ Test Type 102:_____ Test Type 105:_____