Avaya Media Gateway G350, Руководство по обслуживанию

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G350 component maintenance
Setting G350 synchronization
40 Maintenance of the Avaya G350 Media Gateway
June 2004
Setting G350 synchronization
If the Avaya G350 Media Gateway contains an MM710 T1/E1 Media Module, it is usually advisable to
set the MM710 up as the primary synchronization source for the G350. In so doing, clock sync signals
from the Central Office (CO) are used by the MM710 to synchronize all operations of the G350. If no
MM710 is present, it is not necessary to set synchronization.
If Communication Manager is running on an Avaya S8300 Media Server, however, the usual SAT screens
for “display sync” and “change sync” are not present. Clock synchronization is set via the Media
Gateway command line interface (CLI). The command
set sync interface {primary | secondary}
{<mmID> | [<portID>]} defines 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, and
•
<portID> (for the MM720 BRI Media Module) is formed by combining the mmID of the MM to
the 2-digit port number of the BRI port.
By setting the clock source to primary , normal failover will occur. Setting the source to secondary
overrides normal failover, generates a trap, and asserts a fault. The identity of the current sync source in
use is not stored in persistent storage. Persistent storage is used to preserve the parameters set by this
command.
Control of which reference source is the "Active" source is accomplished by issuing the command set
sync interface {primary | secondary} . If secondary is chosen, then the secondary source becomes
“Active”, and the primary becomes “standby”. In addition, fallback to the primary source will not occur if
or when it becomes available.
If neither primary nor secondary sources are identified, then the local clock becomes “Active”.
To set the MM710 as the primary synchronization source:
1
Login at the Welcome to Media Gateway Server menu.
You are now logged-in at the Supervisor level on the Media Gateway. The prompt appears as
G350-mmm(super)#
, where
mmm
is the administered G350 Media Gateway number in the
network.
2
At the prompt, type set sync interface primary <mmid> .
The MM710 Media Module is now configured as the primary clock synchronization source for
the Avaya G350 Media Gateway.
3
At the prompt, type
set sync source primary
.
If theAvaya G350 Media Gateway contains a second MM710 Media Module, type
set sync interface
secondary
. If, for any reason, the primary MM710 Media Module cannot function as the clock
synchronization source, the system defaults to the secondary MM710 Media Module for that function. If
neither MM710 Media Module can function as clock synchronization source, the system defaults to the
local clock running on the S8300 Media Server.