asterisk users - Jul 2004 - T1 Hardware Echo Can

Hello,

After reading the lists and taking reccomendations from TC, I have finally
given up on the echo can built into asterisk.  I am sick of hearing
complaints from users, so the money spent on a hardware echo can will be
worth its weight in gold.

I am curious however, about some setup and component requirements.  It
seems as if every telecom place I call, either never calls back or doesn't
have a clue what I am talking about.  Does anyone have any good companies
with competent sales/engineer people who would help put together a
solution.

Also, for anyone that has hooked up a echo can before.  Do you have to buy
such a large shelf?  Obviously things things are intended for ILEC
installs, however, I can't find anything geared towards the PBX realm.  It
seems everything on Ebay is a 32 module shelf rack.  Thats a bit over kill
for us.

Further, I would imagine this setup.  Please correct me if I am off base.
I would have a straight T1 cable from the Channel Bank to the Echo Can,
and then a X-over from * to the Echo Can.  How are these solutions (e.g.
Tellabs) wired up?   Are there RJ45 connectors on the back of the shelf,
or is it a strip the wire and twist method?

Any assistance that anyone can provide to myself (and the list) would be
greatly appreciated, as there are many people who would benefit from
this...

Thanks!

- Brent

Ditech Communications ( http://www.ditechcom.com/ ) has a 2 slot and a 4
slot chassis and you can populate them with just 1 echo cancelling card if
you like.

They have RJ45 jacks and you have to use a T1 Cross cable on both sides.  We
made our own.. Just regular cat5b and you swap the orange and orange-white
with the blue and blue-white.

hope that helps!

Robb
----- Original Message ----- 
From: "Brent Franks" <mwless@mindworks.net>
To: <asterisk-users@lists.digium.com>
Sent: Friday, July 09, 2004 9:09 AM
Subject: [Asterisk-Users] T1 Hardware Echo Can

> Hello,
>
> After reading the lists and taking reccomendations from TC, I have finally
> given up on the echo can built into asterisk.  I am sick of hearing
> complaints from users, so the money spent on a hardware echo can will be
> worth its weight in gold.
>
> I am curious however, about some setup and component requirements.  It
> seems as if every telecom place I call, either never calls back or
doesn't
> have a clue what I am talking about.  Does anyone have any good companies
> with competent sales/engineer people who would help put together a
> solution.
>
> Also, for anyone that has hooked up a echo can before.  Do you have to buy
> such a large shelf?  Obviously things things are intended for ILEC
> installs, however, I can't find anything geared towards the PBX realm. 
It
> seems everything on Ebay is a 32 module shelf rack.  Thats a bit over kill
> for us.
>
> Further, I would imagine this setup.  Please correct me if I am off base.
> I would have a straight T1 cable from the Channel Bank to the Echo Can,
> and then a X-over from * to the Echo Can.  How are these solutions (e.g.
> Tellabs) wired up?   Are there RJ45 connectors on the back of the shelf,
> or is it a strip the wire and twist method?
>
> Any assistance that anyone can provide to myself (and the list) would be
> greatly appreciated, as there are many people who would benefit from
> this...
>
> Thanks!
>
> - Brent
>
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I love the Adtran 850T and it does have echo cancellation built into it.
I've used them for years, and now for a month or two w/ asterisk.  No
echo at all, ever, period.

W. Kevin Hunt

CCIE #11841
MCSE, Linux+ SME
www.huntbrothers.com
 
-----Original Message-----
From: asterisk-users-admin@lists.digium.com
[mailto:asterisk-users-admin@lists.digium.com] On Behalf Of Rich Adamson
Sent: Saturday, July 10, 2004 7:16 PM
To: asterisk-users@lists.digium.com
Subject: Re: [Asterisk-Users] T1 Hardware Echo Can


Since there has been more then a few people interested in fxo channel
banks, do you (or anyone else) have any recommendations for specific
models that have optional echo cans?