FS all sip signals detected! user registered! he/she can call 5000 (demo-ivr) and ... but i have no sound from place #1(even-though call starts and demo-ivr starts) and have sound from another place #2! #1 NAT Scenario (My Company Network) FS <> Internet <> NAT <> NAT <> More NAT or Firewall is probable <> SIP Phone #2 NAT Scenario (Wimax wireless internet solutions) FS <> Internet <> Wimax Router NAT <> SIP Phone FS logs when being passed dial plans and starts to play IVR for the scenario #1 with no sound at client: http://pastebin.freeswitch.org/21109 My OS(Fedora) tcpdump logs: http://pastebin.freeswitch.org/21110 any suggestion?!