DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-92ANL-LINE, ANL-NE-L (8-Port Analog Line)
9
7 FAIL The conference test or the noise test failed. This could cause noisy or
unreliable connections, or users calling this port may hear an echo. The
problem can also be off-board, as described below.
13 The reflective loop around with gain set to low and the 600-ohm balance
failed. This will cause noisy or unreliable connections.
14 The reflective loop around test (with the gain set to high, using RC
balance) failed. This could cause noisy or unreliable connections. The
problem can also be off-board, as described below.
15 The nonreflective looparound test failed. This could cause noisy or
unreliable connections, or users calling this port may hear an echo. The
problem can also be off-board as described below.
1. Disconnect the terminal equipment from the circuit pack at the
cross-connect and run the test again.
2. If the test fails again, replace the circuit pack and reconnec t the
terminal equipment. If the test passes the second time, then the test
results were affected by the terminal equipment connected to the port;
in this case, ignore the results of this test if all other tests pass or abort
and the station is operating properly. Failure of test 47 does not cause
an alarm. If there are failures of other tests, then investigate those
errors. User reported troubles with this port should be investigated by
using other port test s, by examining station wiring, and by examining
the station to ensure that it is correctly translated as off-premises or
on-premises.
NOTE:
If the looparound and conference circuit test fails for all ports on a
circuit pack, a -5 volt power problem is indic ated. If a TN736 or
TN752 power unit circuit pack is present, either the 631DB AC
power unit or the 676B DC power unit may be defective. (The 631DB
power unit is used in a medium cabinet powered by an AC source.
The 645B power unit is used in a medium cabinet powered by a DC
power source.) The system may contain a TN736 or TN752 power
unit circuit pack or a 631DB AC power unit, but not both types of
power units. To investigate problems with a 631DB AC power unit,
refer to the ‘‘CARR-POW (Carrier Power Supply)’’ Maintenance
documentation. To investigate problems with a 645B DC power unit,
refer to the ‘‘CARR-POW (Carrier Power Supply)’’ Maintenance
documentation. If a red LED on TN736 or TN752 power unit circuit
pack is on, replace the pack. If the test fails on more than 1 port,
check for errors on the TONE-BD or the TONE-PT. If errors, take
appropriate actions. When the tone errors are cleared, rerun the test.
Table 9-36. TEST #47 Loop Around and Conference Test — Continued
Error
Code Test
Result Description/ Recommendation
Continued on next page