I have an NEC 2400 IMX connected via a PRI to a 2851 series router which in turn is connected to UCM 6.1 via MGCP. 4 digit dialing works great between NEC phones and the ip phones. DID calls into the IP phones work great. However, when I try to call out to an external number from the IP phone it looks as though the NEC side is stripping it down to 4 digits no matter what.
Any one have any ideas?