Lest we confuse ourselves???
What you are _implying_, inadvertently no doubt, is that a
modulated analogue connection (ie. from a conventional
modem) is connected to the cell phone to obtain wireless
communications. This approach _was_ used, years ago,
with analogue mobile phones (eg. AMPS system). AFAIK,
all cell phones today, that have data capability, use an
RS-232 or TTL interface for data connection.
I think, a better way to avoid confusion, is to use the
RS-232 prefix when talking about RS-232 connections,
and PSTN (or similar) prefix when talking about the
RJ11 (or whatever) analogue connection to the wired
telephone system. Incidentally, it doesn't actually matter
if you cross your (2 wire) PSTN connections - all PSTN
equipment is [supposed to be] polarity insensitive. Also,
the modulated signal works the same, regardless of
phase reversal.
Joe.
> -----Original Message-----
> From: Gregory J. Feig [SMTP:[EMAIL PROTECTED]]
> Sent: Tuesday, 20 February 2001 7:01
> To: [EMAIL PROTECTED]
> Subject: Re: problems connection HP-LX palmtop to /dev/ttyS0 in Linux
> ...
>
> On Mon, 19 Feb 2001 14:38:56 -0500, Clarence Verge wrote:
>
> ------------snip-----------
>
> > 2) The standard cable used to connect external modems is NOT crossed.
> > The "crossing" occurs in the modems.
>
> ------------snip-----------
>
> Clarence,
>
> Not to be picky, here, but lest we somewhat confuse ourselves, the
> cable used to connect external modems (or Internal modems, for that
> matter) is a two-wire telephone hookup wire...has no crossing or
> uncrossing....just like the radio connection which will be used by
> Michael's cellphone.
>
> ........gregy
>
>
>
> -- This mail was written by user of The Arachne Browser -
> http://arachne.cz/
