Hi, i have compiled astersik using todays cvs. Worked like a charm. Asterisk runs when the oss module is enabled but crashes badly with alsa. [res_musiconhold.so] => (Music On Hold Resource) == Parsing '/etc/asterisk/musiconhold.conf': Found == Registered application 'MusicOnHold' == Registered application 'WaitMusicOnHold' == Registered application 'SetMusicOnHold' [chan_alsa.so] => (ALSA Console Channel Driver) asterisk: pcm.c:5488: snd_pcm_sw_params_set_silence_threshold: Assertion `val < pcm->buffer_size' failed. Aborted (core dumped) I use alsa 0.9.6 on SuSE 8.2 (Linux 2.4.20). Just for info Peter -- dadi-linux www.dadi-linux.de Peter Eckhardt Fon: +49 6071 951256 Weberstr. 36B Fax: +49 6071 951257 64846 Gro?-Zimmern peter.eckhardt@dadi-linux.de