[Asterisk-Users] X101P on a UK BT line ---- txgain issue

[Chris Stenton]

I can't see that any echo cancelling is going to work with a 10db difference
between rx and txgain. If the difference is due to impedance mismatch
reflections then the reflected tx signal is going to be of greater amplitude
than the callers signal.

Chris

----- Original Message ----- 
From: "Chris Bond" <chris at logics.co.uk>
To: <asterisk-users at lists.digium.com>
Sent: Friday, June 25, 2004 9:35 AM
Subject: RE: [Asterisk-Users] X101P on a UK BT line ---- txgain issue


> > I do get echo, lots of it, I am waiting until the new patch they are all
> on about on the
> > list gets into a stable release, then I will upgrade and see if that
does
> the trick.
>
> The patch didn't seem to work for me.
>
> > I am told that some of the echo may be to do with a mismatch in the
> impedance with the BT
> > line.
>
> Problem is do we really want BT messing with gain there end and impedance
> cos it might mess our ADSL lines up =)  I know im on the limits.
>
> Kind Regards,
> Chris Bond
>
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