DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-653DS1-FAC (DS1 Facility)
9
System Technician-Demanded Tests: Descriptions
And Error Codes
Always investigate tests in the order presented in the table below. By clearing
error codes associated with the
Failure Audit
for example, you may also clear
errors generated from other tests in the testing sequence. The
Failure Audit
test
is executed via the test board command.
Far-End Internal Loopback Test (#797)
This test is destructive.
This test starts at the DS1 CONV circuit pack whose equipment location was
entered and traverses over the specified facility and loops at the internal facility
interface on the other DS1 CONV circuit pack in the DS1 CONV Complex. See
diagram below.
Every part of this test is executed under firmware control and the result is sent
back to the maintenance software. The test is executed by sending digital data
through every DS1 channel on this facility. For TN574 DS1 Converter facilities,
test patterns are sent through all DS1 channels. For TN1654 DS1 Converter
facilities, test patterns are sent through one DS1 channel.
If there is only one DS1 facility available, the system will not allow that last facility
to be busied out. In that case, the DS1 CONV circuit pack must be busied out
before executing this test.
On a Standard Reliability and High Reliability System (no PNC duplication), if
there is only one DS1 facility available, then this test can only be executed at the
end-point which is closer to the SPE relative to the neighbor DS1 CONV circuit
pack because of its impacts on the system control links. For TN574 DS1 CONV
boards, the completion of the test will be delayed in this configuration to wait for
the recovery of the system control links. On a Critical Reliability System (PNC
Duplication), or when there are multiple DS1 facilities, the test can be executed at
any DS1 CONV circuit pack.
Order of Investigation
Short Test
Sequence
Long Test
Sequence
External
Loopback
Reset
Sequence D/ND
1
1. D = Destructive; ND = Nondestructive
Failure Audit (#949) ND
DS1 Interface Options Audit (#798) X X ND
Far-End Internal Loopback Test
(#797)
XD
Near-end External Loopback Test
(#799)
XD
