Only new to the world of clocking so be gentle :-)
I have inherited 4 x 3745 voice routers and am trying to understand why the network clocking is configured the way it is.
On one of the routers there is:
network-clock-participate slot 2
network-clock-select 1 E1 2/1 (this is to the PSTN)
network-clock-select 2 E1 2/0 (this is to our internal PABX)
This makes sense to me that we are taking the clocking from the external service provider.
The other 3 x 3745 routers also contain multiple E1 connections to the external PSTN and internal PABX but are configured to use the backplane for clocking.
i.e. no network-clock-participate for all slots.
From what i have read you are better off using the PSTN connection for clocking rather than the backplane.
There are no slip second errors at all and everything is working fine but I am wondering should i be changing the other three routers clocking sources as a best practice type exercise.
I also have to add a new E1 connection to an internal PABX on one of the routers using the backplane for clocking (with a connection to the PSTN) and am wondering if i leave it as is and use the no network-clock-participate slot for the new card.