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Maintenance Object Repair Procedures
555-233-123 10-1108 Issue 4 May 2002
Modem Pool Conversion Resource Loop Around
Test (#98)
The Modem Pool Conversion Resource Loop Around Test is set up as follows:
Figure 10-71. Modem Pool Conversion Resource Loop Around Test Set-up
Test data patterns are transmitted from the Network Control Channels 1 or 3 over
network time slot A through the digital port, looped around through the analog port
via time slot C back to the Network Control Channel circuit via time slot B where
the patterns are checked for accuracy. Finally, the test forces a disconnect by
breaking the connection between the Data Channel and Modem Pool Port (time
slot A) and verifying that the Data Channel and Modem Pool Port go on-hook
within the proper time.
ANY FAIL The Network Processing Element (NPE) of the tested port
did not conference the tones correctly. This causes noisy
and unreliable connections.
1. If the remaining ports are currently not in use (that is,
yellow LED is off), attempt to reset the circuit pack.
Then repeat the test.
2. If the test fails again, replace the circuit pack.
PASS The port can correctly conference multiple connections.
User-reported troubles on this port should be investigated
using other port tests and by examining station, trunk, or
external wiring.
Table 10-416. TEST #97 Modem Pool Conference Test — Continued
Error
Code Test
Result Description/Recommendation
Continued on next page
TS-A
Network
Control
(TN727)
Data
Channel
TN758 Pooled Modem Circuit Pack
Modem Pool Conversion Resource
(One of Two)
TS = Time Slot
TS-C
Analog
Portion Digital
Portion
TS-B