I have an interesting situation with a 1760 router running 4 FXO ports using H323 connecting to a call manager 3.3(3). The FXO trunks work perfectly with both incoming and outgoing calls. The customer has recently moved and broken away from a larger company. The DID numbers at the larger company which run on a PRI are being centrex transfered to the newer companies 1760 and the calls drop after a minute or so. This only occurs with these transfered calls but if you call the new numbers that call the FXO port directly all works fine. Anyone have any ideas on this odd situation?