[Asterisk-biz] PRI and echo cancelation ...

[Mark Armstrong]

Weird thing is that with the latest Asterisk at Home 1.3, all my echo issues
have gone.  This is PSTN.  Our experience is that this is variable, some
PSTN have issues other sites not. Tx and Rx on the same copper pair is an
issue.  We are trying to get our clients to go BRI or PRI (Digital services
) when possible.


Regards
 
Mark 


ACC Australia
Phone: 02 9489 0544
Fax: 02 9489 0522
Mobile: 0401 286 686
 
www.accaustralia.com.au
 


-----Original Message-----
From: asterisk-biz-bounces at lists.digium.com
[mailto:asterisk-biz-bounces at lists.digium.com] On Behalf Of Michael Blood
Sent: Thursday, 18 August 2005 3:55 AM
To: 'Commercial and Business-Oriented Asterisk Discussion'
Subject: RE: [Asterisk-biz] PRI and echo cancelation ...

Agreed,  this should be on the Users List.
My experience has been that PRIs have much less trouble.
The echo typcially comes from the analog to digital conversion.
I personally believe the reason for this is that the Analog to Digital
conversion that happens at the telco is done with much higher quality
equipment with much higher quality echo cancellation than if it is done on
your asterisk box.

Here is an interesting read
http://www.voip-info.org/wiki-Asterisk+echo+cancellation

Google Search:
site:voip-info.com echo cancellation

Michael 

-----Original Message-----
From: asterisk-biz-bounces at lists.digium.com
[mailto:asterisk-biz-bounces at lists.digium.com] On Behalf Of David Mandelstam
Sent: Wednesday, August 17, 2005 8:25 AM
To: 'Commercial and Business-Oriented Asterisk Discussion'
Subject: RE: [Asterisk-biz] PRI and echo cancelation ...


This is really one for the Asterisk Users list, but the answer is that echo
is just as much a problem on PRIs as on analog connections. Any telephone
connection with a POTS analog connection at the far end may have echo
problems, whether or not the Asterisk end is T1/E1 or analog.

David M.

> -----Original Message-----
> From: asterisk-biz-bounces at lists.digium.com
> [mailto:asterisk-biz-bounces at lists.digium.com] On Behalf Of Alan Bunch
> Sent: Wednesday, August 17, 2005 7:56 AM
> To: Commercial and Business-Oriented Asterisk Discussion
> Subject: [Asterisk-biz] PRI and echo cancelation ...
> 
> I have been reading with great interest the posts on trouble shooting 
> echo cancellation with *.  Is it just coninsidence that all of this 
> discussion has been with analog lines.  Are PRI's susceptible to echo 
> problem like POTS lines.
> 
> Thanks for clearing this up.
> 
> Alabun
> _______________________________________________
> Asterisk-Biz mailing list
> Asterisk-Biz at lists.digium.com
> http://lists.digium.com/mailman/listinfo/asterisk-biz
> 

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