DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-748E-DIG-STA (Emulated Digital Line)
9
g. The station went off-hook while it was in the ready-for-service state. U se
the status station command to d etermine the state of the station. The
off-hook should have moved the station to read y-for-service. No technic ian
action is necessary.
h. No terminal is connected to the Dig ital Line board. No maintenanc e action
is required.
i. The circuit pack’s messag e buffer is full. This may be caused by having
many display phones with h eavy traffic connected to the circuit pac k. No
action is necessary.
j. Internal system error; no action is necessary. The error counters 1, 2, 3, 4,
5, 6, 10, 11, 12, 13, 14, 15, and 16 do not hav e any significance for this
MO.
System Technician-Demanded T ests: Descripti ons
and Error Codes
Always investigate tests in the order p resented in the table belo w when
inspecting errors in the sys tem. By clearing error cod es associated with the
Voice and Control Channel Local Loop Around Test, for example, you may also
clear errors generated from other tests in the testing sequence.
Digital Line NPE Crosstalk Test (#9)
One or more Network Processing Elements (NPEs) reside on each circ uit pack
with a TDM Bus interface. The NPE controls port connec tivity and gain and
provides conferencin g functions on a per-p ort basis. The NPE Crosstalk Test
verifies that this port’s NPE channel talks on the selecte d time slot and never
crosses over to time slots reserved for other connec tions. If the NPE is not
working correctly, one-way and noisy connections may be ob served. This test is
part of a port’s Long Test Sequence and takes about 20 to 30 secon ds to
complete. Crosstalk testing oc curs on both the p rimary information channel
(voice) and the second ary information channel (d ata) associated with each
digital station por t. If this test fails on either channel, the station and the DTDM
are taken out-of-service.
Order of Investigation Short Test
Sequence Long Test
Sequence D/ND1
1. D = Destructive; ND = Nondestruc tive
Voice and Control Channel Local Loop Around Test (#13) X D
NPE Crosstalk Test (#9) X ND
Station Lamp Updates Test (#16) X ND