Voice over IP: Difference between revisions

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* [http://www.tech-invite.com/Ti-sdp-abnf.html ABNF Grammar for SDP -- Session Description Protocol (RFC 4566)]
* [http://www.tech-invite.com/Ti-sdp-abnf.html ABNF Grammar for SDP -- Session Description Protocol (RFC 4566)]
* [http://www.tech-invite.com/Ti-sip-archi.html SIP Protocol Structure through an Example]
* [http://www.tech-invite.com/Ti-sip-archi.html SIP Protocol Structure through an Example]
====Microsoft====
*[http://www.microsoft.com/uc/voipasyouare/default.mspx?WT.mc_id=PBX Ever heard a PBX talk!]




<google>ENGELSK</google>
<google>ENGELSK</google>

Revision as of 07:09, 4 September 2007

Soft Phones

SJphone

SJphone is a free VOIP softphone. It can be installed on:

Windows (XP SP2, 2000 SP4, Vista, Vista x64), Windows CE (Pocket PC, Windows Mobile), Linux, MAC

It supports both SIP and H.323 standards, and has a brilliant logging feature if you are having trouble getting a call through.

Note for Vista x64 (64 bit version) users:

On my Dell Lattitude I couldn't make a call or run the Audio Wizard, it crashed the program. I found a workaround:

  1. Select: Menu -> To Advanced Mode
  2. Select: Menu -> Options
  3. Select: the Audio tab.
  4. Select: Advanced Settings...
  5. Uncheck: Enable Adaptive Echo Canceller

After that, I can make a call, and it is also possible to run the Audio Wizard....

I found this by trial and error, first I disabled everything in the 'Audio' tab, and reduced the sample rate, then I gradually enabled everything again.

In SJ Labs forum http://forum.sjphone.org/viewtopic.php?t=1589&highlight=aec you can read the following:

Bugs and issues in 1.65
1. Although there is a Video tab on the Options panel, this build does not support Video.
2. AEC may work unstably if you use some old audio boards, or use different devices for input and output audio (for example, a USB mic and on-board audio system).
3. SJphone may deliver sound with less high frequency. In this case, reduce Driver sampling rate to 8000 (Options -> Audio -> Advanced Audio Settings).

This might explain my problem, but I was able to run it on the same Dell D620 without any problems, when it was running Windows XP.

Service Providers

Links

Tech-invite

Microsoft


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