DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-510DIG-LINE (Digital Line)
9
Digital Line Electronic Power Feed/Positive Temperature Coefficient/PPF Test(#11)
For TN413, and TN754 vintage 13 or earlier, this is an Electronic Power Feed
(EPF) restoral test. In this test, the processor requests that the EPF be turned on
for a given port, and an atte mpt is made to turn on the p ower supply to the
station. If no current is drawn, the station is p robably not connec ted. If an
overcurrent condition is sensed , there may be a short in the loop . A message is
returned reporting that either the EPF was successfully turned on, or that an
overcurrent condition was sensed . This test is repeated again 5 sec onds later.
For TN754 vintage 14 or later, TN754B and TN2136 this is a Positive Temperature
Coefficient (PTC) restoral test. In this test, the processor requests that the PTC be
turned on for a given por t, and an attempt is made to tur n on the power supply to
the station. If an overcurrent condition is sensed , there is probably a short on the
power line that causing the PTC to open and disconnec t the voice terminal. Since
the PTC does not have self-restoral capability, the voice terminal must be
manually unplugged for 30 seconds and then plugged back in to restore the
PTC. A message is returned reporting that either the PTC was successfully
turned on successfu lly with no problem or an overcurrent c ondition was sensed.
This test is repeated again 5 secon ds later.
TN2181 and TN2224 boards carry a Protected Power Feed (PPF) relays, one for
each port. Therefore this will be a Protected Power Feed restoral test. The test
1020 ABORT Test disabled via background testing. Use status station command to
determine when station is available for testing.
2000 ABORT Response to the test request was not received within the allowable time
period.
1. Retry the command at 1-minute intervals a maximum of 5 times.
1
2FAIL The Network Processing Element (NPE) of the tested port was transmitting in
error.
Error code 1 = Crosstalk test failed on the primary channel.
Error code 2 = Crosstalk test failed on the secondary channel.
1. Replace circuit pac k.
PASS The port is correctly using its allocated time slots.
1. To be sure that this is not an intermittent problem, repeat this test up to a
maximum of 10 times to make sure it continues to pass.
2. If complaints persist, examine the station, connections, and wiring.
Table 9-207. TEST #9 Digital Line NPE Crosstalk Test — Continued
Error
Code Test
Result Description/ Recommendation
Continued on next page