FreeSBC is currently set up as SIP FW layer, with a CLASS 4 freeswitch behind it that does LCR but also manage its own gateways (NAPS). Can anyone give me a direction on how to forward SIP OPTIONS still with B2BUA functionality to the class 4’s gateways if the class 4 is sending it FreeSBC. I have a similar setup with OpenSips:
- Class 4 → Opensips (OPTIONS)
- Opensips → Gateway/Nap (OPTIONS-Added Via Header) ← In this case with FreeSBC, Im interested in a new OPTIONS request hiding the CLass 4 details
- Gateway → Opensips (200 OK)
- Opensips → Class 4 (200 OK)