DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance for csi systems
1-63Troubleshooting Features
1
Terminating Trunk Transmission Testing
The Terminating Trunk Transmission (TTT) (noninteractive) feature provides for
extension number access to three tone sequences that can b e used for trunk
transmission testing from the far end of the trun ks.
The three test types should have extension numb ers assigned on the
Maintenance-Related System Parameters Form.
Test Type 100 provides:
1. 5.5 seconds of 1004 Hz tone at 0d B
2. Quiet until disconnect; d isconnect is forc ed after one minute
Test Type 102 provides:
1. 9 seconds of 1004 Hz tone at 0d B
2. 1 second of quiet
3. This cycle is repeated until d isconnect; dis connect is forced after 24
hours.
Test Type 105 provides:
1. nine seconds of 1004 Hz at -16d B
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 -16d B
6. 30 seconds of quiet
7. one half second of Test Progress Tone (2225 Hz)
8. approximately five seconds of quiet
9. forced disco nnect
Troubleshooting ISDN-PRI Problems
The following flowchart, Figure 1-16 and Figure 1-17, defin e s a layered appr o ach
when troubleshooting ISDN-PRI problems. Since a prob lem at a lower layer
affects upper layers, layers a re investigated from low to high. In the f lowchart, 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 1-17.
Test Typ e 100 :_____ Test Typ e 102 :_____ Test Typ e 105 :_____