Hi, if I understand right, the best way to indicate a PSTN line "busy", is something like that in extension.conf: ... background(busy-tone) ... busy So the caller will first hear "my" busy-tone, and after some seconds, when PSTN honours the busy indication (cmd busy), he hears the busy sound by his network operator. Are there any files like busy-tone.gsm with german (aka french or dutch) busy sounds? Roger.