Fujitsu FLM 150 ADM Maintenance And Trouble Clearing page 134

Maintenance and Trouble Clearing
FJTU-320-515-480
4.10.2 Procedure
Step 1 If you have a known-good HS1A-AD1/AD2 unit, use it to replace the original unit,
or locate another unit and inspect it for damage, debris, and foreign objects. Verify
that you have the correct version for your application:
• The HS1A-AD1 unit is used for all FLM 150 ADM systems. This unit does
not support orderwire and DCC operations in nodes adjacent to a
regenerator site.
• The HS1A-AD2 unit is a fully compatible replacement for the HS1A-AD1
and provides orderwire protection and DCC operations for FLM 150 ADM
systems adjacent to regenerator sites and also supports synchronization
messaging.
Refer to Figure 4-26 for a view of the HS1A-AD1/-AD2 unit.
Step 2 Set the option switches to the same positions used on the removed unit.
Step 3 Install the new unit. Is the FAIL LED off?
Complete your fault-reporting documentation.
You have completed this procedure.
Step 4 Check the status of the SV1A unit at the remote terminal. Is the FAIL LED on
the remote SV1A unit off?
Go to Step 6.
Step 5 Replace the SV1A unit at the remote terminal. Are the LINE and FAIL LEDs on
the local HS1A-AD1 unit off?
If Yes:
Complete your fault-reporting documentation.
You have completed this procedure.
Issue 9, May 1999
If Yes:
If Yes:
Call the Fujitsu Technical Assistance Center at 1-800-
USE-FTAC (1-800-873-3822) for assistance.
FNC and FNC Customer Use Only
4.10: Replacing the High-Speed Switch Control
If No:
Go to Step 4.
If No:
Go to Step 5.
If No:
(HS1A) Unit
Vol. ll, Page 480.4-42