Hi, PJSUA works only with snd_pcm_oss module loaded. Without it I see: 12:18:10.045 pjsua_media.c Closing (null) sound playback device and (null) sound capture device 12:18:10.529 pasound.c PortAudio sound library shutting down.. 12:18:10.529 pasound.c PortAudio sound library shutting down.. ... 12:18:10.533 pjsua_core.c PJSUA destroyed... Is it possible to use alsa instead of oss emulation with PJSUA? -- Thanks, Eugene Prokopiev