Ive found that the BRI works best on PTP had quite a lot of issues with PTMP links.what is isdn q921 and q931 debugs tell u ?? can you post a debug and what switch type are you connecing to ??interface BRI0/0/1no ip addressisdn switch-type basic-net3...

ephone 10codec g729r8

you have to put it under ephone config and in cme 4.0 and aboveegephone x codec g729restart

if what i think you are trying to do is like hair pinning the call try in the dial-peer config service sessionlet me know if it helps/dg

what exactly are the problems you are having ?, i setup a SIP based provider, using all CCME for my clients, call forward and transfer working fine in CCME 3.4. for some reason CCME 4.0 is having trouble transfering calls tho.