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Overview
This section describes the Alarm Scan routines. The operating procedures for the routines are dis-
cussed, and definitions are provided for each alarm message.
GENERAL
The Alarm Scan Routines allow you to display or print stored MEGAMUX PLUS alarm messag-
es. Up to 149 alarm messages can be saved by the system; once 149 alarms are accumulated, each
new alarm replaces the oldest alarm stored in the alarm buffer (the alarms are stored in a first-in,
first-out 149-element stack). The alarm message reports the MEGAMUX PLUS node and com-
ponent where the alarm occurred, and the time and date of alarm occurrence.
The alarm message format is illustrated by the following example:
NODE S : AUTO FRAME SECONDARY FAULT
NODE S indicates that the alarm message originated at Node S. AUTO FRAME indicates that
the Auto Frame card at Node S is the location of the alarm condition. SECONDARY FAULT is
the actual alarm; in this case, the secondary Auto Frame card is experiencing a hardware failure.
The date and time of alarm occurrence is displayed to the right of the alarm message.
In software revision X.10, sync related channel alarms are held in a buffer for up to 5 seconds. If
the MEGAMUX PLUS maintains sync for that period, then the alarms are released for normal
alarm processing, otherwise the alarms are discarded. Once you have displayed alarm messages,
you may clear them from the alarm buffer, to make room for new alarm messages.
If firmware releases prior to 3.10, if an Auto Frame redundant switch had taken place, all previous
alarms were erased. In newer releases, alarms are now also recorded in the out-of-service card
provided the local out-of-service update is functional. Each alarm message is defined in Table 7-
1.
When Alarm Scan is selected from the MEGAMUX PLUS Main Menu, an Alarm Scan Menu
appears:
*-ALARM SCAN MENU-*
SCREEN DISPLAY
HARD COPY
DELETE DISPLAYED ALARMS
DELETE INACTIVE ALARMS
Each routine is described in the following paragraphs.
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10/21
04:47
036R660-000, Issue 10
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