Hi Jeff The bad call quality on the 2G iPhone is a combination of static noise (not too loud), 'robotic' speech and some short missing bits. I gathered some info provided by PJSIP, regarding a single call I made in case it's helpful: Call time: 00h:01m:16s 1st res in 3667 ms conn in 14909ms SRTP status: Not active Crypto-suite: (null)\n #0 PCMU @8KHz , sendrecv, RX pt=0 stat last update: 00h:00m:01.497s ago total 4.3Kpkt 698.8KB (873.6KB IP hdr) @avg=63.4Kbps/79.3Kbps *pkt loss=26 (0.6%)* discrd=0 (0.0%) dup=0 (0.0%) reord=0 (0.0%) (msec) min avg max last dev *loss period: 20.000 20.000 20.000 20.000 0.000* jitter : 0.000 4.626 194.625 24.125 5.505 TX pt=0 ptime=20ms On Mon, May 10, 2010 at 4:09 PM, Jeff Brower <jbrower at signalogic.com> wrote: > Remo- > > > My iPhone app uses the PJSIP iPhone Audio driver. > > It works well on 3G & 3GS iPhones, but I am having some voice quality > issues > > on 2G iPhones. > > When making a call with a 2G iPhone, the voice is distorted and it is > > impossible to have a conversation. > > > > Did anyone experince the same issue or has any advise? this can be > related > > to PJSIP/PJSIP audio driver or the 2G iPHone CPU. > > 2nd-gen iPhones don't have as much CPU horsepower, but that's probably not > the whole issue. What does the distortion > sound like? Missing packets? Static? "Cyborg voice"? > > -Jeff > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100511/c86ccf4c/attachment.html>
