SIP-client behind NAT disconnects incoming external call after 8-10 seconds
Scenario: a SIP server running Elastix (Asterisk and FreePBX) with SIP-clients behind NAT. Outgoing calls from the clients (which where CounterPath Xten and Siemens Gigaset C530ip, i.e. completely different brands) works well, but incoming calls are disconnected after 8-10 seconds. Googleing the problem suggests the problem is caused by a SIP REINVITE on the client side, […]