Hi, If you call SIP URI wbdemo at conf.zipdx.com and listen for some time, you'll hear audio distortions. Send DTMF 5 and # to change audio feeds and wideband/narrowband. It looks like this service uses G.722 codec. Other SIP softphones and hardware phones seem to be okay. What do you think about it? pjproject-1.0.2, Mac OS X 10.5.6. Alexei
