Re: [Ekiga-list] Looking for Quicknet card SIP client

Hey Derek,

Thanks for the very detailed reply, I'm sure you're right but I have a quicknet card and it works more or less. I also just picked up some IP phones for cheep and am trying to get a little PBX set up at home so I can stop paying Quest $70 / mo for one land line. Like many I've played around with Asterix here and there but didn't get too far with it. A while back I installed freeswitch and it basically worked out of the box. BTW there are a whole slew of soft PBX switches out there now, I've made a list.

What I want to do now is continue to use the one analog wall phone in the kitchen without going through the hassle of buying yet another FXS/O? adapter since I already have one in my junk box. I've used this linejack board before on h323 calls to friends in asia and it worked ok, maybe not great but well enough.

So all I need is the driver code for a current SIP project like Ekiga and maybe the NIXJ drive for the kernel and I should be able to hack together something that acts like an extension on freeswitch or any other softpbx.

	Thanks for your help,

On Sat, 15 Nov 2008, Derek Smithies wrote:

  You mention the IXJ driver.. Which implies linux..

I worked on a rewrite of the IXJ driver and called it nixj.

IXJ contains horrible races, and is not SMP safe.

IXJ has been ported to the 2.6 kernel series. I think it is fair to say that the driver has been ported to the 2.6 kernel api, but not tested.

If you want to use nixj - you will do best with redhat 9.0 kernel..
nixj was developed on rh9.

the quicknet cards were horrible for sound quality. They did not have the dynamic range of a normal sound card. I was once involved in a commercial project with quicknet cards. The cards were connected to an external mic&speaker. Users had to be careful to speak at the right volume. too loud or too quiet - and the card did not pick up the audio, or garbled it.
Replaced quicknet cards with cheap sound cards - much better.
Users could whisper - or shout - and the audio still got through..

So - why do you want to use quicknet cards?
*Ability to do g729 or g723?
  Get a software codec - they are available for linux.
*Ability to do DTMF decoding?
  The cards were not reliable - I had cases where it gave an answer
   that was 1 less than correct..
  ptlib has dtmf detection routines that work just fine.

One last thing:
The card does not generate interrupts. The driver has to busy check for
audio packets from the card. You will get gaps in the audio.

I am sorry, but quicknet is a bad way to go. Very Very Very Very bad.


On Fri, 14 Nov 2008, clif eugeneweb com wrote:


I've been looking for a somewhat current SIP client for the old Quicknet cards which are still supported in the Linux kernel via the IXJ driver. Ohphone still supports them but that is H323, and I would prefer to use SIP. I see that once upon a time Ekiga/Gnomeeting had drivers for these cards, could someone point me at that code or perhaps another sip project that still supports them? I'm just looking for the endpoint SW not a PBX so Asterix would be a little bit overkill for me.

	Thanks a bunch,
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Derek Smithies Ph.D.
IndraNet Technologies Ltd.
Email: derek indranet co nz
ph +64 3 365 6485

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