We have 4 sites connected via ATM and pass VoIP across it.
Each site has a break out point for PSTN over E1s.
We are getting calls routed out the network, presumably due to network congestion.
Our ATM is at about 10% utilisation, so I am assuming it is not the problem.
How can I check on the routers / in Callmanager to find out how many calls are being passed over the ATM and at what point they should be sent outside.