I have set up a chan_sip trunk for use with voip.ms. The outbound settings are: username=127304_SANMIGUEL type=peer trustrpid=yes sendrpid=yes secret= qualify=yes nat=yes insecure=invite host=losangeles.voip.ms fromuser=127304_SANMIGUEL disallow=all context=from-trunk canreinvite=nonat allow=ulaw T…

This problem has been solved now. I am not sure why they were telling me that because I can see that I was authenticating correctly and registering to their server.