VoIP: SJPhone & TyTN | solution for choppy audio

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Having installed SJPhone 3.20b for Windows Mobile 5.0 (download from: http://www.sjphone.org/preview/ce/) I experienced very choppy inbound audio.

The solution is changing SJPhone's advanced audio settings as follows:

buffer size: 80 ms
input queue length: 10
output queue length: 5
RTP jitter queue length: 5

Audio quality through WLAN is quite okay now. As soon I'm in a place with 3G coverage I'll try to place a VoIP call over 3G, if O2 Germany hasn't blocked VoIP ports yet.

I am getting better resutls with these settings:

• Driver buffer size, msec: 100
  Driver input queue length: 10
  Driver output queue length: 10
  RTP jitter queue length: 32

Btw, x-lite ce 1.01 has better quality than SJphone, at least on my TyTN, download here:

http://forum.xda-developers.com/viewtopic.php?t=58154

Also, calls must be done using the USB headset otherwise you get horrybly echo.

I do have the sound coming from the rear speaker...is that what you have?
Further, the sound with SJphone is absolutely horrible...whatever the audio settings....
I tried X-lite..gives same effects...
It s really unusable.
When I call the same correspondant with my PC, it s seemless..
Any clues?
Thx

use the usb headset :P

No sound...

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Hi. I am using HTC X01HT (Softbank) which is supposed to be equivalent to TyTN. I installed SJphone but for some reason no sound is coming. Seemingly, even though I don't hear any sound, the recipient phone is normally ringing. Of course, even if the recipient picks up the phone, still silence on both sides. Any solution? Thank you in advance.

Check your SIP and NAT settings. You'll have problems if your internet connection or the voip server you are connecting to are behind a NAT.

You should use a STUN-server!

@Poof

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Hi Poof,

Sorry for the trivial question but I geuss that answer isn't that obvious as it seems. YOu've mentioned that you're using X-Lite with some specific settings. I've downloaded the software using the link you had provided. I did manage to specify the SIP proxy and other SIP related settings during the first run of X-Light.

My question is: HOW DO YOU CHANGE OTHER SETTINGS? In case I need to change SIP IP HOW DO I DO THAT? I didn't succeed with finding searate file responsible for configuration nor I cold find settings changes option in the application itself.

I'd appreciate if you could advice me on these mattares.

TyTN and SJPhone

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Hi,
I get horrible sound delays with SJPhone + TyTN. I tried all the settings from this forum and many others and although the sound quality seems OK (I didn't see any significant improvement because of the USB headsed) the delay is 2 to 3 times bigger (up to 1.5-2 s) than on my Wizard.
Please let me know if the above mentioned settings don't give you any delay. If there's no delay, could you please let me know the ROM (and any possible improvements) that you're using?
Please follow this thread also for news:
http://forum.labs.softjoys.com/viewt...r=asc&start=20
As for the X-Lite application - I get also delays and bad sound quality. As for its interface - it makes you go nuts, and even more. I never managed to find out how to change the settings for one SIP-account. (through the registry ? this is a joke, right?) Even the PC version is made as if that guy wanted to make a patience testing quiz, not a softphone.

Thank you all.

USB headset

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It seems it has something to do wih the USB headset. If I use it - SJPhone gets stuck. If I don't use it - SJPhone runs fine and even the sound quality is acceptable