Hi Tony,
It is not OK to get a "backup activated" when a call is made over a PRI or BRI interface.
While you can prevent the forwarding of these events I don't think you can hide them fro the faults view.
To hide them you can locate and edit a file called tpmgr-param.conf. Keep a copy of the original file!
IFDescrPattern-.1.3.6.1.4.1.9.1.875 ~*Bearer*
You need to find the SystemObjectID of the devicetype(s) you want to filter, like example here 1.3.6.1.4.1.9.1.
875
the ~*Bearer* will filter out the interfaces that have Bearer in the description. This will stop the channels from being monitored while the BRI / T1 / E1 / PRI remain monitored.
You need to rediscover the devices in faultmanagement when you have doen this.
Cheers,
Michel