hello, my situations is as follows. In our comapny we are planing to have *. I'm testing it now. If we will buy G729 codec for * ... UA(SIP) <-> FW <-> (SIP)*(H323) <-> (H323)GATEKEEPER(H323) <-> (H323)AS5300 <-> world the following equipment speeks G729: *, GK ,AS5300. All call from UA to another endpoing go through *, because of mixed SIP and H323 sihnalization. If the UA does not known G729 (known GSM, G711), which codec wil be used between * and AS5300 ? Will * translate GSM codec (or other) to the G729. If yes, how to get it work? best regards hudecof -- mail: [phudec@postel.sk] www: [http://www.postel.sk] cellular: [+421 02 50203166] icq: [99518783] gpg: [http://hudecof.net/data/hudecof.gpg]