Hi, I am having an issue with my newly configured system. I am completely new to this application so bare with me. I have three numbers from Sipgate.co.uk and have been previously using them all without issue on my Cisco 7960G IP phone (for the last 3 years) I registered them with the 3CX system and all appeared to be good until I received my first call and exactly 20 seconds in I lose incoming audio although the line stays active for another 10 seconds and the other caller can still hear me and then the line goes dead. I removed two of the registered lines leaving just one line but the same thing still happens. I set the line up to ring at an extension number directly on my Cisco phone. So everything is working, I can dial out, receive calls, everything except the call drops after 32 secs. My Cisco phone does not have any sort of call time out facility, as I have been using the same phone fro the last 3 years directly with my VOIP provider. Also, can someone explain the DID purpose fully, why do I need this? ADDED LATER: I have just tested my line by making an outgoing call and the line does not drop at all, which seems odd to me? I left the call connected up to 1 minute and I still had voice going both ways. I'm sure this will help someone pinpoint my issue.