[Asterisk-Users] Good FXO for UK use.

[Patrick Lidstone (Personal e-mail)]

> 
> Message: 5
> Date: Wed, 27 Apr 2005 12:04:30 +0100
> From: "Johan Akerstrom" <Johan.Akerstrom at telamon.co.uk>
> Subject: RE: [Asterisk-Users] Good FXO for UK use.
> To: "Asterisk Users Mailing List - Non-Commercial Discussion"
> 	<asterisk-users at lists.digium.com>
> Message-ID:
> 	<785E4442F3B7B84DB69AE662793B582116CC4E at novello.telamon.local>
> Content-Type: text/plain; charset="us-ascii"
> 
> I had a look at it and...yes it seems to be the same card and it costs
> much less then I payed for it :(
>  
> - j -
>  
> 
> 
> ________________________________
> 
> From: asterisk-users-bounces at lists.digium.com
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Razza
> Sent: 26 April 2005 17:16
> To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
> Subject: RE: [Asterisk-Users] Good FXO for UK use.
> 
> 
> Got a feeling that the same card I bought from 
> goods2world.co.uk, which
> gave me terrible echo problems, due to the impedance mismatch 
> of the US
> telco network (600ohm) versus the BT network.
>  
> When using that card all seemed to disconnect fine, I assume the issue
> lies with the TDM400/FXO daughter board.

The problem is indeed unique to the TDM400 FXO daughter board. I can confirm
that the X100P and clones do correctly detect hangup on the BT network, but
are plagued by echo problems due the impedance mismatch with the UK phone
network.

Patrick