If i connect the uc540w to the modem all works well. Once I connect the UC540w behind a router, outgoing calls work. But incoming does not. In the debug log I have error sip/2.0 501 unsupported method. Via: sip2.0/udp 192.168.0.3:5060;branch=z9hG24.....;received=108.168.....
I have enabled port forwarding the internal ip address including DMZ. any suggestions?
