Troubleshooting; Alarms - Motorola McIAS 1610 Series System Manual

2.0

Troubleshooting

McIAS 1610 diagnostics consist of LED indicators and alarms to provide an indication
that a fault has occurred.
The following sub-sections describe these fault indication sources along with
procedures to follow in identifying and resolving system problems.
2.1

Alarms

McIAS 1610 transmits alarms which indicate a system malfunction to a central office
(CO) scan point via the Alarm Transition board. There are two alarm classifications:
major and minor. A major alarm indicates that there is a problem which has forced
McIAS 1610 to discontinue operation. A minor alarm indicates that there is an area
of McIAS 1610 that is not operational, but the system is still able to service some
incoming calls.
There are four alarms recorded by McIAS 1610: a major alarm (the most critical) and
three minor alarms. Refer to Table 1-1, LED Indicator Functions, for alarm details.
The Alarm Transition board is attached to the SBC and installed in Slot 5 of the card
file. The Alarm Transition board uses four sets of "dry" (electrically isolated) contacts.
The major alarm is associated with a pair of normally open (NO) contacts. In the idle
condition, these contacts are open. When an alarm condition occurs, the contacts
close to transmit the alarm signal. The minor alarms are associated with normally
open (NO) contacts. In the idle condition, these contacts are open. When an alarm
condition occurs, the contacts close to transmit the alarm signal. Upon successful
reinitialization, the contacts revert to their normal position.
In response to most error conditions, the system will recover in one of two ways: the
affected individual component will be reset or, if this is not sufficient, the entire
system will be reset.
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