I tried to configure web callback using VoipBuster, VoipStunt, SipDiscount, etc. in all kinds of combinations, using them for calls in both destinations, and the result was user 1=answers, user 2=answers, but there is no audio.
Has anyone tried this using Asterisk? I am not interested only in the callback, but has anyone succeeded in bridging any two channels of these providers in any way?
Any information will be appreciated.
P.S:Also every once in a while I get a message that the server doesn’t respond to the user name or password, or it is temporary moved. I am using a public IP address, after I change it the registration on the servers above is going through.