Pri Ext. Clock; Sec Ext. Clock; Acknowledge Alarms (Aco); Table 4-10. Pri External Clock Alarms - ADTRAN MX2800 STS-1 System Manual

Section 4, Status

Acknowledge Alarms (ACO)

PRI Ext. Clock

The PRI EXT Clock alarms indicate when a failure condition is encountered on the PRImary clock source
(if configured). The possible values for this alarm are provided in
Condition
Disabled
Normal
Available
LOS/AIS
Fail
Unavailable

SEC Ext. Clock

The SEC EXT Clock alarms indicate when a failure condition is encountered on the SECondary clock
source (if configured). The possible values for this alarm are provided in
Condition
Disabled
Normal
Available
LOS/AIS
Fail
Unavailable
6. ACKNOWLEDGE ALARMS (ACO)
This selection allows an active alarm to be acknowledged, which results in the deactivation of the alarm
relays and an indication of the acknowledgment by the alarm (
the ACO button (described in the section
4-8

Table 4-10. PRI External Clock Alarms

Description
The selected clock has been disabled by the user and will not be used.
The clock source is currently being used as the timing reference.
The clock source is available to be used as a timing source if a failure of the cur-
rent source occurs.
The clock source is not valid due to an LOS or AIS condition.
An internal hardware failure on the unit prevents the clock source from being
used.
The user has specified a T1/E1 port to be used as an external clock source, but
the port has not been enabled.

Table 4-11. SEC External Clock Alarms

Description
The selected clock has been disabled by the user and will not be used.
The clock source is currently being used as the timing reference.
The clock source is available to be used as a timing source if a failure of the cur-
rent source occurs.
The clock source is not valid due to an LOS or AIS condition.
An internal hardware failure on the unit prevents the clock source from being
used.
A T1/E1 port is specified to be used as an external clock source, but the port has
not been enabled.
ACO Buttons
Table 4-10.
Table
) LED. It is the software equivalent of
ALM
on page 2-13).
MX2800 STS-1 User Manual
4-11.
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