User's Manual

Lucent Technologies — Proprietary
See notice on first page
22-46
401-660-100 Issue 11 August 2000
2. Numerous Processor alarms.
Procedure:
1. Be sure to rule out problems with the FCA and AYG3 fuses, as described
above.
2. If the LINEARIZER LED is continuously lighted and the LAC has issued a
large number of Processor alarms, then the LAC should be replaced.
The LAC Alarm Query System (LAQS)
The LAC's microprocessor stores the current LAC alarm status as well as
information about what caused Processor MINOR alarms. The LAQS system is a
testing tool which connects to the LAC alarm bus, allowing the user to
communicate directly with the LAC. To access this information, the LAF frames
must be disconnected from the alarm bus and connected to a FITS computer via a
customized RS-232 to RS-422 Converter. Even though this will result in SANITY
alarms at the MSC for all LACs (during the time that the alarm cable is
disconnected), this procedure will not interfere with live traffic at the cell site.
!
CAUTION:
The information stored in the Processor Alarm Registers is lost when the
LAC is powered down. Therefore, do not turn off the LAC prior to connecting
the LAQS system.
NOTE:
Contact your AT&T Account Executive for information on how to obtain the
following equipment.
Required Equipment:
■
Any Computer With a 9-Pin Serial Interface
■
LAWX Interface Kit (ED3R102-30 G1).
Installation:
1. Disconnect all LAF frames from the alarm bus by removing the connector
at J104 on the top of the RCF frame. This will result in SANITY alarm
reports at the MSC for all LACs while the cable is disconnected.
2. Connect the RS-422 cable from the converter box to the free alarm bus
connector on the last LAF frame: J1 on LAF0 if equipped with only one
frame, J2 on LAF1 if equipped with two frames.
3. Connect the FITS computer to the converter box with the IEEE-488 cable.