Safe Routing with GSM termination!
How many times your clients complained about "dead call" when they receive SIP 503 after SIP 183? How many tickets they raised?
That fake SIP 183 is coming from the GSM Gateway as a response on call INVITE, then if GSM can not handle that call the GW will release SIP 503.
Your client will be unable to re-route such call to another provider/supplier as hunting/routing stopped once SIP 183 received.
We have a solution for that! Our new feature makes Safe Routing, it can delay SIP 183 and release it to client only if call can be handled by GSM side, otherwise we pass SIP 503 (without SIP 183) to let your client make re-routing further. Let the call be alive! Contact us to get latest IXC Softswitch release.