Re: [GnomeMeeting-list] PC-to-PC calls using Quicknet hardware?

[Derek Smithies <derek indranet co nz>]

Hi,
 If you are gong to use a QTI card on windows, you are almost forced to 
use a microtelco account. In the little bit of work I have done on 
windows, a micro telco account is required. - that is the way the software 
on windows is written.

On linux, you do not require a microtelco account to use the card.
On linux, pc to pc calling is easy easy with a QTI card.

On linux and windows, you do require a microtelco account to call PC to 
phone.

===================================

echo cancellation. The echo cancellor will do a  reasonable job of 
cancelling echo, for phone input or mic/speaker input.
If you use mic/speaker input, you get zero hardware dtmf detection.

echo cancellation is weird, and not immediately obvious. If I am hearing 
my own voice echoed back to me, changing my echo cancellation levels will
not help. The fault is the remote end.
Put another way. person A and B are talking to each other.
A hears no echo.
B hears echo
Problem:: A needs to increase his echo cancellation level.

======================

Software wise - the cards are ok to setup. Depending on your distro, 
you may need to build a kernel.
    the need to build a kernel is a function of how well (or poorly) your 
distro supports external linux kernel modules. 
OR, 
you can try the kernel module for ixj - which is older and non SMP safe.
If you use the ixj module supplied in the kernel, some minor configuration 
is required of /etc/modules.conf and or /etc/sysconfig/pcmcia

===================

There is a software echo cancellor that has been posted to the open h323 
list by Andre Adrian. It does work, but requires the sound card has a dual 
channel feature. It does not work with QTI cards. It works well with Alsa, 
I think.

Derek.
==================================================


 On Fri, 20 Aug 2004, Mark Hellman wrote:

> When I use Gnomemeeting (or Netmeeting), both parties have to use 
> headphones to prevent echo. I would like to be able to use loudspeakers 
> without echo. I am considering buying a Quicknet card, not much because 
> of the PC-to-phone features, but to have Echo cancellation on PC-to-PC 
> calls.
> 
> But after reading the page http://www.linuxjack.com/ipj.htm, I am not 
> sure if I can take advantage of Quicknet's Echo cancellation feature on 
> PC-to-PC (Gnomemeeting-Netmeeting, Gnomemeeting-Gnomemeeting) calls. The 
> page says «FREE Interoffice calls on the office network when you 
> configure PC-to-PC calling (using MicroTelco)». Does this mean I always 
> need to have a MicroTelco account even if I just want to make PC-to-PC 
> calls?
> 
> I would be grateful if somebody enlightens me on this subject.
> 
> Thanks,
> Mark
> 
> _______________________________________________
> GnomeMeeting-list mailing list
> GnomeMeeting-list gnome org
> http://mail.gnome.org/mailman/listinfo/gnomemeeting-list
> 
> 
> 

-- 
Derek Smithies Ph.D.                           This PC runs pine on linux for email
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