Chapter 22: Setting Synchronization - Avaya G450 Manual

Chapter 22: Setting synchronization

If the Avaya G450 Media Gateway contains an MM710 T1/E1 media module, it is advisable to
define the MM710 as the primary synchronization source for the G450. In so doing, clock
synchronization signals from the Central Office (CO) are used by the MM710 to synchronize all
operations of the G450. If no MM710 is present, it is not necessary to set synchronization.
Enter set sync interface primary|secondary mmID [portID] to define a potential
stratum clock source (T1/E1 Media Module, ISDN-BRI), where:
mmID is the Media Module ID of an MM stratum clock source of the form vn, where n is the
●
MM slot number
portID is the port number for an ISDN clock source candidate. The port ID consists of the
●
slot number of the media module and the number of the port. You can set more than one
port. For example, v2 1, 3, 5-8.
Note:
The port ID parameter only applies if the source is a BRI module.
Note:
By setting the clock source to primary, normal failover will occur. The identity of the current
synchronization source is not stored in persistent storage. Persistent storage is used to
preserve the parameters set by this command.
Note:
Setting the source to secondary overrides normal failover, generates a trap, and
Note:
asserts a fault. Thus, it is only recommended to set the clock source to secondary
for testing purposes.
To determine which reference source is the active source, use the set sync source
primary|secondary command. If you choose secondary, the secondary source becomes
active, and the primary source goes on standby. In addition, fallback to the primary source does
not occur even when the primary source becomes available.
If neither primary nor secondary sources are identified, the local clock becomes the active
source.
The following example sets the MM710 media module located in slot 2 of the G450 chassis as
the primary clock synchronization source for the Avaya G450 Media Gateway.
set sync interface primary v2
set sync source primary
Issue 1 January 2008 637