Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!mcvax!unido!sbsvax!emma
From: emma@sbsvax.UUCP (Martin Emmerich)
Newsgroups: comp.dcom.modems
Subject: re: Modems for Minitel ( 1200/75bps )
Keywords: 1200/75 bps  SmartLink 2400A
Message-ID: <762@sbsvax.UUCP>
Date: 5 Jun 89 10:29:50 GMT
Organization: Universitaet des Saarlandes, Saarbruecken, W-Germany
Lines: 26


In article <692@flatline.UUCP>, erict@flatline.UUCP (J. Eric Townsend) writes:
> I'm looking for leads/pointers/sources of modems that will work
> with the French Minitel (U.S. Videotel in the United States).  These
> modems use a wierd 75bps one way/1200bps the other way protocol.
> I would prefer that they run off a serial port, but if you only
> know of ones that are PC internal modems, that'd interest me as well.

At the CeBit Fair, Hannover, West-Germany, I bought an SmartLink 2400A external
Modem. List price was 293$, I think. It supports these strange split-speed
modes in _both_ ways ( isnt it V.23 ? ), V.21, V.22, V.22bis and 300+1200 bps
Bell. 
The 2400A is manufactured in Taiwan by one of the companies who have built the 
SmarTeam modems. They now have separated into Team and SmartLink.

Rumors say it would be possible to use a normal V.22 modem for split-speed. You
only had to lengthen every bit into 16 bits ( = 1200 / 75 ) by software. But I
never tried it. It is said that someone had done it sucessfully.


CU,
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