Avaya G700 Maintenance Manual page 292

9 G700 and Media Module LEDs:
[<portID>]} defines a potential stratum clock source (E1/T1 Media Module, ISDN-BRI).,
where <mmID> is the Media Module ID of a MM stratum clock source of the form "vn", where "n is
the MM slot number, and
For the MM720 BRI Media Module, <portID> 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 peristent 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", and, 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".
When a MM710 Media Module is driving a clock sync source line to the G700 main clock, the
Yellow LED does not indicate port activity, but instead indicates that the MM710 is the sync source
as follows:
• If the incoming signal is good, the YELLOW LED is driven on for three seconds and off for 200
milliseconds.
• If the incoming signal is lost and the sync line cannot be driven, the YELLOW LED is alternately
off for three seconds and on for 200 milliseconds.
• If the YELLOW LED is on for 2.7 seconds and off for.3 seconds, the toneclock synchronizer is in
"active" mode and an external synchronization source is being used as a synchronization reference.
• If the YELLOW LED is on 0.3 seconds and off 2.7 seconds, the toneclock synchronizer is in
"active" mode and the internal (onboard) high accuracy clock is being used as a synchronization
reference.
• If the UDS1 receives a downlink CCMS message to stop driving the clock sync lines, the
YELLOW LED reverts back to indicating port activity.
Note: Unless otherwise indicated, the following commands issue from the G700 MGP
CLI.
Table 108. mgp-001-1(configure)# show sync timing
SOURCE
Primary
Secondary
Local
Comment: No failures, SIG GREEN on and ACT on when trunk is seized
292
MM
v0
Media Module LEDs
STATUS
Not Configured
Not Configured
Active
Maintenance for S8300/S8700 and G700
555-234-101 — Issue 2 — October 2002
FAILURE
None