"Graham" <me@privacy.com> wrote in message
news:et9g0l$een$1@news.datemas.de[color=blue]
> "Ivor Jones" <ivor@despammed.invalid> wrote in message
> news:55ou79F2628dgU1@mid.individual.net...[/color]

[snip]
[color=blue][color=green]
> > It could be the ATA ringing output voltage. BT lines
> > generally supply ringing at around 75 volts or so, if
> > the ATA is giving a lower voltage, some phones might
> > ring but others not. Ivor[/color]
>
> But an incoming call has been signalled over the air
> interface, so why doesn't the handset audibly ring?[/color]

As I said, maybe there isn't enough voltage. If the ATA has a setting for
it, try upping it a notch.

Ivor