Hi I am already succesfully installed asterisk in my Linux Box. And successful to transfer call ATA-186>>Asterisk>>Mediatrix 1204 switch>>PSTN with the default IVR features of Asterisk. But I can't hear the .gsm file.I already istalled "zgsmplay-1.3". Any body please help me to play these .gsm file. Thanks in advance. Dipak Kumar Paul _________________________________________________________________ Discover digital jadoo! Enter this contest. http://server1.msn.co.in/sp03/mediacenter/index.asp Win cool prizes!