Hello, Anyone had problems using G279 codec with Grandstream GXP1405. GXP1405 is connected to FS which is connected to an Asterisk box. FS has no codec installed so it is in passthrough mode. The audio received in the phone is bad. Sometimes volume goes down and it has low quality. Working connected directly to Asterisk using G729 box goes well. Working through FS using G711 goes well. If I analyze both flows, from Asterisk and from FS, inside FS box using G729, all audio is OK. So I don't know why phone plays it bad... Any idea? Regards