I am having trouble registering a trunk with my service provider from my asterisk box, but I am able to use an ATA to register to my provider.
I have been doing “wireshark” captures of the SIP Registrations between the ATA and my provider and the Asterisks box and my provider and the difference I have noticed is the Call-Id line in the To section of the SIP packets are different.
The Call-Id line of my ATA has @MyPublicIpAddress and the Call-Id line of my Asterisks box is @127.0.0.1.
Can someone explain to me why my Asterisks box is adding the @127.0.0.1 to the Register packet, and how I might be able to modify that to reflect a different ip address.
I have tried using the “externhost” option in my SIP.CONF file, but that make any difference with the Call-Id line of the Register Packet.
Any help you can provide would be greatly appreciated.