I am hoping someone is going to bite on the sound quality issue. I have Asterisk connected via a Conceptronics HFC-S card to an Elmeg ICT880 PBX internal extension line. Running Asterisk 1.0.3 and latest Bristuff. I have firefly and Xlite clients running on Windows XP. Calls between Xlites through Asterisk seem to be fine. Calls from anything to ISDN is terrible whatever settings I change. Calls on VoiP for example to the 411 service on FWD through my Asterisk box are not as good as using the same service by phone, not by a long way. There is distortion and also a kind of harmonic tone in the background when the person is talking on the other end (i.e. it sound like someone is playing a low toned kazoo in time to the person talking). Everything is going ulaw. It is on a quiet network. The Desktop is an IBM ThinkCenter with built in audio - 2.66 GHz P4. Anyone got any ideas? I am pulling my hair out here trying to get this working.