I have been using a generic Wildcard X100P (ebay.ca special) for a few months and while it has been great for experimenting the voice quality tends to be inferior to an analog phone plugged into the same wall jack. I had also had problems with people leaving voicemail from time to time - their message is not audible on playback - just mostly background noise and the odd static as if when they raise their voice/tone slightly. A reboot seems to improve things for a while - but that seems a little to Windows-sy an answer. This has been the case with asterisk at home 1.5, 2.0 and now 2.1(running asterisk 1.2.0/linux kernel 2.6). I have been considering the purchase of a Sipura 3000 since I could use an additional FXS as well, but only if this is the likely cause of the bad audio.
Anyone care to share their successes/failures wrt call quality with Sipura 3000s? One more thing I have been banging my head on: I have a Sipura 2002 with two extensions connected. On one of those extensions I have two physical phones connected and there is an amazing amount of static occassionally on that extension but only when receiving a call. If I hangup and call the person back the call is clear. I have checked the cables running from the two phones to the Sipura 2002 and have not found any problems. I'm wondering how I might further isolate the problem - thinking as I'm typing here, maybe I could set that extension to always record and see if the recordings show the bad audio. Hmm.
