I'll just reply to this one e-group (uk.people.deaf) and not the
other crossposted groups.
If you really want to test a TDD number, then simply ring these
countries' national relay service numbers!!
In Switzerland, the relay service (in all 3 languages, Swiss-German;
Swiss-French and Swiss-Italian) is provided by Procom. You can
look them up on
www.procom.ch
In any case, I contacted Procom a few days ago on your behalf
as I've lived over there a few years ago hence I'm familar with
Procom and other local TDD numbers there. I asked them about
what protocol they use - and this is their reply:
"the TDD-protokol is EDT, it is part of the V.18 set of protokols.
It is likly the V.21, but 110 Baud, start bit, 7 data and 2 Stop Bits."
Can't help you with the Dutch stuff, but you could websearch for
their 'Dutch relay textphone tdd' and go from there.
- AndrewN