I make call through TDM Card. 2 FXO and 2 FXS.
When I make call from IP Phone to outside, my voice does not reach another party, but I can hear him. However, when I make call from FXS to outside, everything is fine. All outside call goes through FXO port.
zaptel version: 220.127.116.11
Asterisk version: 1.4.22
What does may cause?
Thanks in advance!