[asterisk-users] More Echo

[John]

You should also get your t1 carrier to provide echo cans on the  
circuit. Fairly common and easy for them to set up.
John Chastain




On Sep 4, 2009, at 3:07 PM, Steve Totaro  
<stotaro at asteriskhelpdesk.com> wrote:

>
>
> 2009/9/4 Vinícius Fontes <vinicius at canall.com.br>
> No it's not a fact of life. VoIP works as fine as conventional  
> telephony once it's correctly set up.
>
> Try echocancel=256 instead of echocancel=yes and also run fxotune  
> (check the man page). If that all fails, install OSLEC. It's an  
> excellent free software echo canceller, that works much better than  
> Asterisk's default MG2.
>
>
>
> Vinícius Fontes
> www.asteriskforum.com.br - Informações e discussão sobre Asterisk  
> e telefonia IP
>
> ----- "Jason Baker" <jbaker at glastender.com> escreveu:
>
> > Well I tried Doug's suggestion and the echo is now better, but  
> when I
> > call an outside analog line I still get some echo. I can hear my  
> voice
> > in the ear piece of the phone with a slight delay. Is this just a  
> fact
> > of life with VoIP, or is there a better way to reduce line echo?
> >
> > Again, for reference, I am using the VPMADT032 echo cancellation
> > module attached to a Digium TE121 PCI express card. The incoming  
> phone
> > service is a PRI.
> >
> >
> >
> > Jason Baker
> > IT Coordinator Glastender, Inc.
> > 5400 North Michigan Road
> > Saginaw, Michigan 48604 USA
> > Phone: 989.752.4275 ext. 228
> > Fax: 989.752.4276
> > www.glastender.com
> >
> > Doug Lytle wrote:
> >
> > Jason Baker wrote:
> >
> > language = en
> >
> > group = 1
> > echocancel = yes
> > echotraining = yes
> > signalling = pri_cpe
> > switchtype = 4ess
> > usecallerid = yes
> > context = incoming
> > channel => 1-23 Just noted that your system is out of Saginaw.  The
> > system below is out
> > of Livonia, with an AT&T PRI as well.  Note the rx/txgain entries,  
> it
> > may be useful as well:
> >
> >
> > switchtype=national
> > context=pri
> > signalling=pri_cpe
> > echocancel=yes
> > echotraining=yes
> > echocancelwhenbridged=yes
> > rxgain=-1.0
> > txgain=-4.0
>
>
> Just curious.  Have you tried turning off all echo can?  I RARELY  
> need echo can on T-1.
>
> I was also under the impression that rx/tx gain was only for POTS  
> lines.
>
> -- 
> Thanks,
> Steve Totaro
> +12409381212 (Cell)
> +12024369784 (Skype)
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