Symmetricom TimeProvider 5000 User Manual page 111

To set the Accumulated leapseconds 

set clock leapseconds <value>
Range: Accumulated leapseconds
Enter date and time in YYYY-MM-DD,HH:MM:SS format (UTC)
Example 1:
To set date to June 09 2009, and time to 10:35 PM and 24 sec.(UTC)
tp5000> set clock date-time 2009-06-09,22:35:24
tp5000> sync tod-source now
Example 2:
To set the accumulated leapseconds to 29 seconds 
tp5000> set clock leapseconds 29
Remarks: The reference mode must be frequency in order to change date, time or
leapseconds. If the reference mode is time, the user is not allowed to overwrite the
date, time, or leapseconds. See
The "set clock" command only sets time on the IMC card. The "sync tod-source
now" command must be sent after setting the time in order to sync IOC time to the
IMC time.
Level : Config and Admin only
098-00028-000 Revision F – May, 2012

20 to 255 seconds
Set REF command.
Chapter 3
TimeProvider 5000 CLI Command Set
TimeProvider 5000 User's Guide 111