I’ve got Asterisk PBX system consisted of 2 SIP clients (X-Lite softphones running on Win XP). Calling and voice transmission in calls works OK, but I got problems in playing .gsm sample sound files in the call.
I’ve set up auto answer with playback of some .gsm sound file on one extension and when I call that extension, it automatically answers but plays that sound file extremely bad, with mumbling instead of real sound. When I change the played sound file, I just got another, different mumbling. I’ve realized that function of playing files goes OK, but only with the extremely low quality, the voice recorded in the file is unrecognizable.
Any possible solutions to the issue?