VoIP Mailing List Archives

[asterisk-list at puzzl...]

Hi,

I need to setup an Asterisk box with 4x ISDN BRI links. Looking at the
specs of various cards I favor the Digium B410P and Sangoma A502D
because of hardware echo cancellation. Does anyone have any experience
with either card, good or bad? Which one would you choose and why?

Thanks for your insight.

Regards,
Patrick

[vinicius at canall.com.br]

I have a box running a TE410P with echo cancelling and it works like a charm. Set up once, forget about it.

Att
Vin?cius Fontes
Desenvolvimento
Canall Tecnologia em Comunica??es Ltda.

----- "Patrick" <asterisk-list at puzzled.xs4all.nl> escreveu:

[andres at telesip.net]

We have tested both and they work fine. The Sangoma is much easier to
install as it does not depend on any other driver, you just run
'setup-sangoma' and follow the instructions. You don't have to fiddle
with the linux kernel or zaptel or chan_misdn. It just works. Plus
its more modular. You can chose 2/4/6 ports to buy and if you need more
just add remoras up to 24 ports. The Digium card is fixed to 4 ports,
period.

Having said that, make sure you stick with the version that has hardware
echo cancel and not even try the other one. We made the mistake of
buying the first time without echo cancel expecting to test the
'software echo cancel'. But there is no such thing as 'software echo
cancel' on this card. I do not even understand why Sangoma would make a
version without the hardware echo cancel. You get some degree of echo
on practically every call.

Andres.

Patrick wrote:

[mwatson at becon.org]

I haven;t used any BRI cards but... call me crazy but wouldn;t they still be using Zaptel (even your sangoma... the script might just be configuring it for you)...

and btw, software echo cancel happens in the zaptel kernel driver... it has nothing to do with the hardware (hence why its a software echo cancel)....

You also would of had the option of buying HPEC licenses for software echo cancel from digium for a rather cheap price.

--
Matt
________________________________________
From: asterisk-users-bounces at lists.digium.com [asterisk-users-bounces at lists.digium.com] On Behalf Of Andres [andres at telesip.net]
Sent: Thursday, April 24, 2008 5:04 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] Digium B410P or Sangoma A502D?

We have tested both and they work fine. The Sangoma is much easier to
install as it does not depend on any other driver, you just run
'setup-sangoma' and follow the instructions. You don't have to fiddle
with the linux kernel or zaptel or chan_misdn. It just works. Plus
its more modular. You can chose 2/4/6 ports to buy and if you need more
just add remoras up to 24 ports. The Digium card is fixed to 4 ports,
period.

Having said that, make sure you stick with the version that has hardware
echo cancel and not even try the other one. We made the mistake of
buying the first time without echo cancel expecting to test the
'software echo cancel'. But there is no such thing as 'software echo
cancel' on this card. I do not even understand why Sangoma would make a
version without the hardware echo cancel. You get some degree of echo
on practically every call.

Andres.

Patrick wrote:

[stotaro at totarotechn...]

The Sangoma kernel drivers are different than Zaptel, while running
the install script you are asked if you would like to generate the
Zaptel configs but it is not required, you must also run wancfg to
configure the cards beyond the Zaptel configs. The Sangoma drivers
kind of run on top of the Zaptel.

It seems that the newest wanpipe drivers and Zaptel 1.4 work without
the D chan patch which is very nice IMO, I hate patches. I have run
the BRIStuff install and it has tons of patches! Kind of scary but it
works for it's purpose.

I have only done BRI once but there was absolutely no echo by simply
setting echocancel=yes, echocancelwhenbridged=no.

I hear "might as well get the hardware EC board" quite a bit, but on
all the many dozens of PRIs I have installed, software EC has been
adequate (if needed at all). It would have meant quite a bit of
wasted money that was better spent on a nice 48 port gigabit switch.

I have tested both ways (hardware vs. software), no difference really
(Sangoma). Sangoma actually sent me one of each before purchasing
seven quad cards to test if hardware EC was going to be required for
one deployment. I returned the hardware EC card and ordered seven
quad PRI cards.

Maybe I am just lucky or have not had enough exposure to BRI but ISDN
is ISDN, right (it really is a question, I don't know)? Now on
analog, that is a horse of a different color, also the phone on
either side, but especially your side can be the culprit (older
Grandstream for one) Polycom seems to eliminate much of this.

Thanks,
Steve Totaro

On Thu, Apr 24, 2008 at 7:50 PM, Matt Watson <mwatson at becon.org> wrote:

[oza-4h07 at myamail.com]

2008/4/25 Matt Watson <mwatson at becon.org>:

[oza-4h07 at myamail.com]

2008/4/24 Andres <andres at telesip.net>:

[oza-4h07 at myamail.com]

2008/4/24 Patrick <asterisk-list at puzzled.xs4all.nl>:

[asterisk-list at puzzl...]

On Thu, 2008-04-24 at 17:04 -0400, Andres wrote:

[asterisk-list at puzzl...]

On Thu, 2008-04-24 at 19:50 -0400, Matt Watson wrote:

[asterisk-list at puzzl...]

On Thu, 2008-04-24 at 20:17 -0400, Steve Totaro wrote:

[asterisk-list at puzzl...]

On Fri, 2008-04-25 at 08:13 +0200, Olivier wrote:

[asterisk-list at puzzl...]

On Fri, 2008-04-25 at 08:21 +0200, Olivier wrote:

[tzafrir.cohen at xorco...]

On Fri, Apr 25, 2008 at 01:37:15PM +0200, Patrick wrote:

[tzafrir.cohen at xorco...]

On Thu, Apr 24, 2008 at 02:04:43PM -0300, Vin?cius Fontes wrote: