Thank you for your advice.  I guess NTT did it again.  They simply guard it
turf at the expense of Japanese people.  Oh, well, someday, it will have to
pay for it.

<invalid@invalid.invalid> wrote in message
news:1083278729.22953.0@echo.uk.clara.net...
> On Thu, 29 Apr 2004 14:07:50 -0700, tomato wrote:
>
> > I moved to Japan a while ago.  I found the phone switch's caller ID
function
> > not working (it was a US model).  I heard UK caller ID protocol is
similar
> > to the Japanese NTT standard.  Does anyone have experience using UK
caller
> > ID equipement in Japan?  Or any other regional caller ID works in Japan?
>
> Unfortunately NTT caller ID is incompatible with just about everything
> else: while the data encoding is similar to the SIN227 format, (line
> reversal followed by FSK data according to V.23), the actual data is
> quite different, and hence you won't get anything usable out of a
> non-Japanese device.
>
> The mark/space frequencies may even be different, it's been a while
> since I last read NTT's analogue line interface document.
>
> My Japanese equipment doesn't work on a SIN227 line, so I doubt it works
> the other way around either. A cheap PHS phone and ホ?ムステーション is a
good
> combination, just make sure the home station supports caller ID.