
Configuring Synchronous Services
117345-B Rev. 00
2-9
Configuring Clocking Signals
By default, the synchronous interface operates with an external clock source at
64102 b/s. You can configure the source and speed of synchronous timing signals
by:
• Setting the Clock Source
• Setting the Internal Clock Speed
• Setting the External Clock Speed
Setting the Clock Source
The Clock Source parameter specifies whether the origin of the synchronous
timing signals are supplied by the router (Internal) or by a network device
(External).
With this parameter set to Internal, the router supplies the required timing signals.
If you set the clock to Internal, set the internal clock speed as described in the next
section.
With this parameter set to External (the default), an external network device
supplies the required timing signals. In most cases, this parameter should be set to
External. See “Setting the External Clock Speed” on page 2-11
.
Set the Clock Source parameter to Internal or External for the interface.
Using the BCC
clock-source
variable
For example:
sync/4/1# clock-source internal
sync/4/1# clock-source external
Using Site Manager
See the Clock Source parameter on page A-58 for information.
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