I have a small thing here:
Asterisk box in the office (NAT), 2 internal sip extensions, 1 external sip extension. When a call from outside comes in, any sip extension can answer - everything is fine. Any extension can dial out - everything is perfect. BUT when smb on internal ext call the external extension = no sound at all.
Port forwarding 10000-20000 is configured on the firewall
nat=comedia (I have tried force_rport as well)
I believe the sound is being forwarded from ext extension to the asterisk box itself, which in its turn does not know what to do with it.
Any help would be highly appreciated and anticipated.
Thanks in advance.