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

[Derek Smithies <derek indranet co nz>]

Hi,
   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.

Derek.

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

> Greetings,
>
> 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,
> 	Clif
> _______________________________________________
> ekiga-list mailing list
> ekiga-list gnome org
> http://mail.gnome.org/mailman/listinfo/ekiga-list

--
Derek Smithies Ph.D.
IndraNet Technologies Ltd.
Email: derek indranet co nz
ph +64 3 365 6485
Web: http://www.indranet-technologies.com/