Use change synchronization to change the synchronization source for the system. After running change synchronization, clocks may momentarily lose synchronization.
Use change synchronization to administer primary and secondary references for the Stratum 4 option, or -Switch, indicating that the synchronization references are input directly to the switch.
Syntax
change synchronization [ media-gateway n | css | port-network n ]
media-gateway n
Change the gateway number.
change synchronization feature interaction
DS1 interface, BRI trunk, or UDS1 board selected as either a primary or secondary sync source cannot be removed on the DS1 media module administration screen or the regular media module administration screen.
change synchronization field descriptions
Field
Description
Stratum
Enter 3 for stratum-3 clocking or 4 for stratum 4 clocking.
Primary
First choice system synchronization source. Blank means no synchronization. Enter 5-character board location on any system.
Sync source must be in the cabinet being administered.
Secondary
Five-character board location for second choice system synchronization source. Blank means no synchronization.
Sync source must be in the cabinet being administered.
Location
Media module location of all administered DS1 media module (media gateway).
