user manual

DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-1463TIE-TRK (Tie Trunk)
10
7,
129,
131, or
133
(cont’d.)
FAIL
(cont’d.)
NOTE:
If the loop around and conference circuit test fails
for all ports on a circuit pack, a -5 volt power
problem is indicated. 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
port power unit for AC-powered systems)
Maintenance documentation. To investigate
problems with a 645B DC power unit, refer to the
CARR-POW (carrier port power unit for
DC-powered systems) 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. If the test fails again, see
FAULT ISOLATION above.
PASS Tie trunk Loop Around and Conference Test is
successful. This port is functioning properly.
1. If users are reporting troubles, examine loop
connections to the port.
Table 10-443. TEST #33 Loop Around and
Conference Circuit Test — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page