[Asterisk-Users] trouble with SIP softphone calling IAX2 softphone

[Kavit Munshi]

hi all,

I have an SIP softphone (kphone on FreeBSD) and an IAX2 client (FireFly 
on Windows) trying to call each other. When the SIP client calls IAX 
client the call gets connected but the SIP client cannot hear any voice. 
the IAX client can hear SIP clients voice very clearly. When the IAX 
client tries to call the SIP client asterisk says "Unable to create a 
channel of type (SIP/1009)". Both of them can access Zaptel Interfaces 
and make calls to the PSTN. Both can call clients of their own protocol 
and converse.

I am using ulaw  and Asterisk to SIP is not behind a NAT. IAX2 is a 
client on an external network that successfully connects to asterisk and 
makes calls to the PSTN lines.

I would appreciate any help what so ever. If you need me to post my 
confs please tell me so and I will upload them.

regards

Kavit