Adtran 4200659L6 Manual Do Utilizador

Chapter 4. Status

61200659L1-1

MX2800 STS-1 User Manual

4-9

– 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.

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:

–

indicates that the selected clock has been disabled 

by the user and will not be used.

–

indicates that the clock source is currently being 

used a the timing reference.

–

indicates that the clock source is available to be 

used as a timing source if a failure of the current source occurs.

–

indicates that the clock source is not valid due to an 

LOS or AIS condition.

–

indicates that an internal hardware failure on the unit 

prevents the clock source from being used.

– 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.

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:

–

indicates that the selected clock has been disabled 

by the user and will not be used.

–

indicates that the clock source is currently being 

used a the timing reference.

–

indicates that the clock source is available to be 

used as a timing source if a failure of the current source occurs.