ADTRAN 1200291L1 Switch User Manual


 
Chapter 4. Status
61200659L1-1 MX2800 STS-1 User Manual 4-9
•H
OLDOVER
– indicates that a failure in the selected clock sourc
has occurred and the unit has entered hold-over mode. In this
mode, the last known good clock reference frequency will be
held within 4.1 ppm for a minimum of 24 hours.
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:
•D
ISABLED
indicates that the selected clock has been disabled
by the user and will not be used.
•N
ORMAL
indicates that the clock source is currently being
used a the timing reference.
•A
VAILABLE
indicates that the clock source is available to be
used as a timing source if a failure of the current source occurs.
•LOS/AIS
indicates that the clock source is not valid due to an
LOS or AIS condition.
•F
AIL
indicates that an internal hardware failure on the unit
prevents the clock source from being used.
•U
NAVAILABLE
– indicates that the user has specified a T1/E1
port to be used as an external clock source, but the port has not
been enabled.
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:
•D
ISABLED
indicates that the selected clock has been disabled
by the user and will not be used.
•N
ORMAL
indicates that the clock source is currently being
used a the timing reference.
•A
VAILABLE
indicates that the clock source is available to be
used as a timing source if a failure of the current source occurs.