Without the API, it might be able to be done with cURL ? Since it is "In Theory" just acting as the browser

It is true that the hardware does not need to be super powerful to work with VoIP and it is possable on the chumby (If someone has the guts to try it). I think the biggest problem is the Microphone input, Using the built in Mic would give feedback with the speakers (Inless you used a headset)

Google Grand Central is not exactly a VoIP Client. It is a "Switchboard ACD" application. It basically calls two phones and connects them, which can be done on any hardware (via cURL)

Should feedback no more than a telephone set to speakerphone. Also the microphone and speakers are faced in opposite directions, should be helpful.

We don't moderate the wiki except for spam.

The wiki is set up for the use of the community - while we may edit things every now and then when we run across things that are in error, we don't actively monitor it for accuracy or completeness.

>>- we have indeed run some simple SIP-based VOIP clients on the chumby device and they work OK

Duane:

    Can you please give us pointers or info on those sip-based voip clients you have tested on the chumby?  I am seriously looking into writing a sip phone for the chumby

KingDavid

I was looking at pjsua too... it doesn't have g729 support though...although codec support on a sip client is a bit of a job, it is doable... I am officially working on a sip client for the chumby now... anyone who wants to pitch in, welcome.

KingDavid

>>>I think you should look a bit more on the G.711 codec as it uses less processor compared to the G.729.

  Of course it uses less processor, g711 means "no compression"... you will need 64K though... in voip you need to get that signal to the other side asap.  You may have 64k available, but the other side might not.  Wi-fi definitely is always a potential factor that lowers quality.  Compressed calls use from 10k to 30 tops... g729 is proprietary, however.

King Dave

this may be better asked to the pjsip developers, but thought I'd try here first:

did any of you have to specify what audio device with pjsua? (and if so, which one?) -- didn't have any trouble building the pjsua binary, scp over, runs just fine (a little slow), can put in registration + STUN config, UA registers fine. (this is pjproject 1.5.5 btw)

if I do specify playback device (0,1,2 etc.) pjsua crashes. if I specify -1 or don't specify (which defaults to -1) then it runs ok until making calls and gets:

16:50:59.598  pjsua_media.c  Unable to open sound device: Unable to find default audio device (PJMEDIA_EAUD_NODEFDEV) [status=420006]

for outgoing calls, or for incoming call:

17:04:46.756  pjsua_media.c  Opening sound device PCM@16000/1/20ms
17:04:46.760  pjsua_media.c  Opening sound device PCM@44100/1/20ms
17:04:46.761  pjsua_media.c  Opening sound device PCM@48000/1/20ms
17:04:46.761  pjsua_media.c  Opening sound device PCM@32000/1/20ms
17:04:46.761  pjsua_media.c  Opening sound device PCM@16000/1/20ms
17:04:46.762  pjsua_media.c  Opening sound device PCM@8000/1/20ms
17:04:46.762  pjsua_media.c  Unable to open sound device: Unable to find default audio device (PJMEDIA_EAUD_NODEFDEV) [status=420006]
17:04:46.762  pjsua_media.c  Error opening sound device: Unable to find default audio device (PJMEDIA_EAUD_NODEFDEV) [status=420006]

I built it like this, using the wiki instructions and arm-2008q3 toolchain:
./configure --build=i386-linux --host=arm-linux --prefix=/mnt/usb/pjsip --disable-l16-codec  --disable-gsm-codec  --disable-g722-codec --disable-g7221-codec --disable-speex-codec --disable-ilbc-codec --disable-speex-aec

I only copied over the executable, are there some missing libraries it wants? the only ones I can see in the binary are stuff that should already be there:
/lib/ld-linux.so.3
libm.so.6
libnsl.so.1
librt.so.1
libpthread.so.0
libc.so.6

pjsua-arm-unknown-linux-gnu: ELF 32-bit LSB executable, ARM, version 1 (SYSV), for GNU/Linux 2.6.14, dynamically linked (uses shared libs), not stripped

if it's not pilot error, could it simply be whatever version you guys tried back in 2008 played nicer with the chumby?

thanks