Maintenance Object Repair Procedure
555-233-142
8-880 Issue 1 May 2002
PDATA Port Local Loop-Around Test (#602)
This test is destructive.
This test verifies the per-port circuitry on the PDATA circuit pack. This test is
executed by the PDATA circuit pack on command by the switch. The loop-back is
done internal to the circuit pack at point “A” in the figure. Failure of this test
indicates an on-board fault associated with the port hardware on the circuit pack.
Figure 8-32. Configuration for Port Local Loop-Around Test
1 FAIL Response to the test was not received for the PDATA circuit pack within the
allowable time period.
1. Retry the command at 1-minute intervals up to 3 times.
2. Reset board UUCSS if the other ports on the board are idle (amber LED is
off), or run status data-module extension.
3. Retry the command at 1-minute intervals up to 3 times.
4. Replace the circuit pack.
2 FAIL The received test packet from the PDATA port is different than the test packet
transmitted to it.
1. If the test fails 3 times, reset board UUCSS if the other ports on the board
are idle (amber LED is off), or run status data-module extension).
2. If the test continues to fail, replace the circuit pack.
PASS The PDATA port can terminate a LAP-D link.
Table 8-372. Test #558 LAP-D Connectivity Test — Continued
Error
Code
Tes t
Result Description / Recommendation
Continued on next page
P
D
A
T
A
EIA
A
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