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 T ests: Descripti ons
And Error Codes
Always investigate tests in the order p resented in the table below. By c learing
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 bo ard command.
Far-End Internal Loopback Test (#797)
This test is destructive.
This test starts at the DS1 CONV circuit pack whose equip ment location was
entered and traverses over the spe cified facility and l oops at the internal facility
interface on the other DS1 CONV circuit pac k 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 soft ware. 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 throug h 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 c ase, the DS1 CONV circuit pack must b e busied out
before executing this test.
On a Standard Reliability and Hig h 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 c loser to the SPE relative to the neighbor DS1 CONV circuit
pack bec ause of its impacts on the system control li nks. For TN574 DS1 CONV
boards, the compl etion of the test will be delayed in t his configuration to wait for
the recovery of the system control links. On a Cr itical Reliability System (PNC
Duplication), or when there are multip le DS1 facilities, the test can be exec uted at
any DS1 CONV circuit pack.
Order of Investigation Short Test
Sequence Long Test
Sequence External
Loopback Reset
Sequence D/ND1
1. D = Destructive; ND = Nondestruc tive
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