I got one of these devices working :

http://www.crucible-technologies.co.uk/ ... &did=43864
connected to girder via a Sollae RS232->ethernet converter
(girder/netremote then displays the caller name on various displays in my living room and office and mutes the amplifier at an incoming call)
p.s. I tried one of these EX700 devices to convert FSK to DTMF, so that I could see the caller ID on my DECT phone's display :
http://www.limacom.nl/contents/nl/p143.html
but that doesn't work for me...
I don't know yet, if the problem is the EX700 or my new PABX...
Marcel