[TriLUG] VOIP soft phone help.

[Jim Ray]

You can easily get into *thousands* of dollars per unit when you start
talking about echo cancellation and digital signal processing that
allows you to point mic at speaker and avoid feedback. Seems like there
was a pro audio company called Sabine that had a feedback busting device
that you might be able to pick up cheap for experimenting.


-----Original Message-----
From: trilug-bounces at trilug.org [mailto:trilug-bounces at trilug.org] On
Behalf Of Thomas Gardner
Sent: Monday, August 20, 2012 4:01 PM
To: Triangle Linux Users Group General Discussion
Subject: Re: [TriLUG] VOIP soft phone help.

I did look into buying actual conference room phones a bit, but the
problems I was having there were 1) primarily expense.  I can think of
at least a dozen (likely even more) places I'd want to put one.
Per unit cost is pretty important.  The ones I saw were hundreds per
unit.  2) I'm really liking the idea of wireless, as long as it's
encrypted well.  At first I was thinking wired (who wants everything you
say to your wife broadcast to the whole neighborhood?), but the more I
thought about it, the more I thought a good encrypted IP network should
do the trick, and save a lot of hassle.  I've gotten some really good
information from a friend on this list so I think I know what to look
for.  3) I think I'd have to run my own phone switch to make that work.
Yet another thing to spend money on and yet another thing to learn.  At
least what I learn about soft phones might be useful in other ways.  I
doubt learning about phone switches would.
4) I really want it to be an automatic system.  I don't think I'd be
able to program the phones to automatically dial into a conference call
when they come up.  If that's true, then going with conference room
phones means I'd have to go around to a dozen or so phones and put each
one on speaker and dial into the conference every time our power goes
out and comes back (which happens to us a LOT).

Thanks, though.  It was a good suggestion.  Unfortunately, when I was
looking into it, I just couldn't get past all that.  If you know of a
device, however, that addresses all or even some of the concerns above,
though, by all means please speak up 'cause I missed it.

Thanks,
tg.

On 8/20/12, Jim Ray <jim at neuse.net> wrote:
> Polycom makes some great conferencing phones that have echo 
> cancellation algorithms built in. I am not sure how you could look at 
> the software , though, without reverse engineering their product. You 
> are really looking more at digital signal processing and may want to 
> use fast Fourier transform.
>
> Sent from my iPhone
>
> On Aug 20, 2012, at 11:04 AM, "Thomas Gardner" <tmg at pobox.com> wrote:
>
>> On 8/20/12, Jim Ray <jim at neuse.net> wrote:
>>> Just curious: why would two devices in same room need to communicate

>>> over Skype?
>>
>> Well, that isn't exactly the application.  What I'm trying to do is 
>> have all the devices conference themselves into each other so that 
>> someones voice that gets picked up on any of them will be broadcast 
>> to all the others.  This is going to be a closed call.
>> All the devices will be in the same building, and won't need to 
>> connect to anything in outside world.  I'm trying to get as close as 
>> I can to 100% coverage of the square footage of the building, so with

>> that, I figure there's going to be some coverage overlap.
>> I was hoping someone on this list knew of some slick SW that might be

>> able to manage the resulting echo (or any of the other problems I 
>> mentioned in my first post that I thought I might have to worry
about).
>>
>> It may not be possible, so I may have to drop it like so many other 
>> boneheaded ideas I've had over my lifetime, but I thought it was 
>> worth a try.  Some guys just never learn, eh?  :-)
>>
>> L8r,
>> tg.
>> --
>> This message was sent to: Jim Ray <jim at neuse.net> To unsubscribe, 
>> send a blank message to trilug-leave at trilug.org from that address.
>> TriLUG mailing list : http://www.trilug.org/mailman/listinfo/trilug
>> Unsubscribe or edit options on the web    :
>> http://www.trilug.org/mailman/options/trilug/jim%40neuse.net
>> TriLUG FAQ          :
>> http://www.trilug.org/wiki/Frequently_Asked_Questions
> --
> This message was sent to: Thomas Gardner <tmg at pobox.com> To 
> unsubscribe, send a blank message to trilug-leave at trilug.org from that

> address.
> TriLUG mailing list : http://www.trilug.org/mailman/listinfo/trilug
> Unsubscribe or edit options on the web	:
> http://www.trilug.org/mailman/options/trilug/tmg%40pobox.com
> TriLUG FAQ          :
http://www.trilug.org/wiki/Frequently_Asked_Questions
>
--
This message was sent to: Jim Ray <jim at neuse.net> To unsubscribe, send a
blank message to trilug-leave at trilug.org from that address.
TriLUG mailing list : http://www.trilug.org/mailman/listinfo/trilug
Unsubscribe or edit options on the web	:
http://www.trilug.org/mailman/options/trilug/jim%40neuse.net
TriLUG FAQ          :
http://www.trilug.org/wiki/Frequently_Asked_Questions