Maintenance Object Repair Procedures
555-233-123
10-1486 Issue 4 May 2002
Common Shadow Circuit Loop Back Test (#283)
This test allows maintenance to loop data through the common shadow circuit and
examine the results. The test is designed to test the shadow data and shadow
address portions of the common shadow circuit. The test is done entirely on the
Duplication Interface circuit pack.
The Common Shadow Circuit is put into Maintenance Mode before the test is run.
Maintenance software writes data into an address in the maintenance address
space. This data is routed through the common shadow circuit and put into the
FIFO bank of the common shadow circuit. Maintenance reads the contents of the
FIFO bank and compares them with the value written to the maintenance address
space. The test is repeated with another address in the maintenance address
space.
This test does not disable the common shadow circuit and can be run with no
disruption in service. The test must be executed from control carrier B to test the
Duplication Interface B Common Shadow Circuit and from control carrier A to test
the Duplication Interface A Common Shadow Circuit.
Table 10-567. TEST #283 Common Shadow Circuit Loop Back Test
Error Code
Te s t
Result Description/Recommendation
1029 1030
2011 2012
2013 2014
2015 2016
2017 2018
2019 2020
2021 2022
2023 2024
2025 2051
ABORT Refer to the STBY-SPE Maintenance documentation for a
description of these error codes.
1022 ABORT Internal system error
1. Retry the command at 1-minute intervals a maximum of
5 times.
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