I have 2 servers trunked IAX, one of them has 2 TDM800P cards to terminate calls to PSTN. the problem is all calls to PSTN is almost one-way voice. the voice is always broken. ztmonitor shows that most of the time of the call the Tx is zero, while there is always Rx activity on this channel.
<br><br>Any clue?<br>I am using Asterisk 1.4.5, G729, SIP from clients to 1st server, IAX between servers, one of the server is NATed.