DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-184ATM-EI (Expansion Interface Circuit Pack)
9
NOTE:
To get a better indication of a problem’s location, test both ATM-EI circuit
packs on the associated fiber link, whether the circuit packs are both
ATM-EI circuit packs or not.
NPE Cross Talk Test (#6) (TN2238 only)
This test is non-destructive. The NPE Cross Talk test verifies that the selected
TDM bus time slot never crosses over to time slots reserved for other
connections. The test also checks for cross connections, where the board
talks/listens to time slots other than those specified. Since this test uses many
system resources (TDM time slots, tone generator, tone detector, and others), it
runs as a part of a demand test only.
This test fails if either the TDM programmable logic and/or the interface to the
DSP is not operating properly. Failure of these components may result in one-way
or noisy connections. Refer to Figure 9-3
for a schematic of this test.
Table 9-78. System Technician-Demanded Tests: ATM-EI
Order of Investigation
Short Test
Sequence
Long Test
Sequence
Reset Board
Sequence D/ND
1
1. D = Destructive, ND = Non-destructive
ATM Board DSP Test (#1258) for TN2238
circuit packs
XX ND
Expansion Interface 2way-Transmission Test
(#241)
XX ND
ATM Board Framer Looparound Test (#1260) X D
NPE Cross Talk-Test (#6) for TN2238 circuit
packs
XND
Expansion Interface Lock Query Test (#304) X X ND
ATM Board Error Query Test (#1259) X X ND
ATM Expansion Interface Reset (#1256) X D
ATM board DSP test(#1293) for TN2305 and
TN2306 circuit packs.
XX ND
ATM Cross Talk test(#1298) for TN2305 and
TN2306 circuit packs
XND
Continued on next page
