I am trying to configure a Adtran Netvanta 7100 to work with a VS-GW1202 4 port gateway. I got the SIP trunk up and got calls to ring in both directions but there is no audio on the calls when I answer. Do you have any idea what is causing this? Do any one have any experience setting this up? The VS-GW1202 acts as a server and the extensions in from the Netvana 7100 make calls through the SIP trunk.
My SIP phones are registered to the NetVanta 7100 which is the PBX, i am trying to connect the gateway to the PBX via a SIP trunk to make calls. The gateway is connected directly to the NetVanta 7100 no firewalls between.