I have a Cisco 2851 loaded with DSPs and it has an internet connection to support the SIP trunk to Vitelity. Below are the appropriate sections of my config for this setup. I am running CME in both SCCP and SIP which is why i have some SIP bind to in...

Problem: 1. Ringback is not working on any phones going out my SIP gateway (2811 --> my SIP provider). I have tried fast start for incoming/outgoing and enabled MTP, but then my DTMF stops working and I still don't have a ringback. Below are the deta...