DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-647DS1-FAC (DS1 Facility)
9
display fiber
-link commands to check the values for this DS1
facility. Contact T1 Network Service to check the modes used by
the network. See the above sections, “Line Coding” and “Framing
Mode” for details on how these options apply to the TN574 and
TN1654 DS1 CONV boards.
3. For TN574 boards and TN1654 boards in T1 mode, check line
equalization settings as described in the above section, ‘‘DS1
CONV-1 and DS1 CONV-2 Line Compensation.’’
4. Enter
display errors
and follow the associated repair procedures
for any EXP-INTF, and SNI-BD errors for the Fiber Endpoints. Enter
display errors
and follow the associated repair procedures for any
FIBER-LK errors for this fiber link.
5. If the problem still persists, replace this DS1 CONV circuit pack.
6. If the problem still persists, replace the DS1 CONV circuit pack at
the other end of the DS1 CONV Complex.
f. Loss of Frame Alignment (LFA) Alarm, the RED alarm: This alarm indicates
that the DS1 interface associated with the DS1 facility cannot frame up on
the received data.
For the following repair procedure, refer to Figure 9-28
and the diagrams
in the related test descriptions.
1. If the network is used instead of private T1 lines, check that the DS1
facility and the network are using the same line coding. For TN574
boards and TN1654 boards in T1 mode, also verify that the Framing
Mode used is the same. For TN1654 boards, verify that the two
boards in the DS1 CONV Complex are using the same bit rate. Use
list fibers
and
display fiber-link
commands to check the values
for this DS1 facility. Contact T1 Network Service to verify the modes
set for the network. See the above sections, “Line Coding”,
“Framing Mode” and “Bit Rate” for details on how these options
apply to the TN574 and TN1654 DS1 CONV boards
2. Run the Near-end External Loopback test #799 via the
test
ds1-facility UUCSSf external-loopback
command by setting up a
loopback at CPE side of CSU towards DS1 CONV circuit pack
shown as loopback point
LB 1
in the test description diagram. If the
test fails, replace connectors and the cables between CSU and the
DS1 CONV circuit pack.
3. If the test passes, run the Near-end External Loopback test #799
via the test ds1-facility UUCSSf external-loopback command by
setting up a loopback at DS1 facility side of CSU towards the DS1
CONV circuit pack shown as loopback point LB 2 in the test
description diagram. If the test fails, replace the CSU.
4. If the test #799 passes, run the Far-end Internal Loopback test
#797 via the test ds1-facility UUCSSf long command. If the test
#797 passes, go to step 6. If the test fails, then run the Near-end
