I'm trying to configure a 7940 as a SIP Client using Vbuzzer SP.
SIP Provider (126.96.36.199) <-----> (188.8.131.52) NAT Router (192.168.0.1) <------> (192.168.0.12) 7940
When I use firmware P0S3-8-2-00, I can get inbound calls, but outbound calls will drop within seconds.
When I use any other firmware (e.g. P0S3-8-12-00), I can NOT get inbound calls, but outbound calls works fine.
I'm using the same files when loading the configs (SIPDefault.cnf and SIP0015F9270D99.cnf), but I could not get both inbound and outbound calls to work on the same firmware. I've telneted to the phone and with debug on, while receiving a call and I could see messages coming in: