Hello, Is there a particular order in which codec should be entered in the oh323.conf file? I believe that they are put in order of priority. But depending on which codec is put before another, even if the caller does not support all of them. Let me clarify. I have a cisco ATA. When I have this in my oh323.conf file, codec=G7231A6K3 frames=1 codec=G729 frames=1 codec=GSM0610 frames=1 codec=G711A frames=1 codec=G711U frames=1 With the G711 codec i cannot hear any sound. In the debug, it shows that g711 is used. But when I have. Other codecs(g723 and g729) seems to work fine. codec=G711A frames=1 codec=G711U frames=1 codec=GSM0610 frames=1 codec=G7231A6K3 frames=1 codec=G729 frames=1 I can hear the a very very slowed down robotic voice. Thanks Kido