Chris Davies submitted this idea :[color=blue]
> I'm interested in an ATA with two internal extension ports and one
> (analogue) PSTN connection. I'd like one of the internal ports always to
> default to the PSTN line, but allow routing via at least one SIP provider
> given some particular key sequence prefix (e.g. #001*, or whatever). The
> other should default to one of the SIP providers, but allow routing via
> either PSTN or any of the other SIP provders given some particular key
> sequence prefix.
>
> Pricing would ideally be towards the lower end of the market but
> definitely sub-£100.
>
> Any suggestions, please?
>
> Many thanks,
> Chris[/color]

Perhaps
<http://www.avm.de/en/Produkte/FRITZBox/FRITZ_Box_Fon_ata/index.html> ?