V.23 protocol

From: Don Maslin <donm_at_cts.com>
Date: Mon Dec 6 23:04:53 1999

On Tue, 7 Dec 1999, Geoff Roberts wrote:

>
> ----- Original Message -----
> From: Jean-Pierre Hofer <hofer_at_wgh.ch>
> To: Discussion re-collecting of classic computers
> <classiccmp_at_u.washington.edu>
> Sent: Tuesday, 7 December 1999 4:51
> Subject: V.23 protocol
>
>
> > Hello,
> >
> >
> > I am looking for specifications of the old V.23 protocol, or general
> > informations about this.
> >
> > Would someone know some hints ?
>
> Essentially it was a split baud rate used mostly by VIATEL and some bbs's.
> It was 1200/75 duplex where the user had a 1200 link for downloading and a
> 75 link for uploading.
> (Worked on the assumption - mostly true - that the user would be mostly
> transferring data
> /files to his machine from the host, and sending only control/command stuff
> back.)

And adapted - in principle, at least - by US Robotics for their HST
protocol.
                                                 - don

> It worked ok for chatting too, since most people type a lot slower than
> that.
> If you need more, I can dig up specs, audio freqs etc.
> FYI, 1200 bps amateur packet radio modems use the 1200 portion, in half
> duplex mode,
> often using the 7910 or 7911 World modem chips that were prevalent in such
> things.
> I have a packet modem that I still use today that was converted from an
> ancient Sendata
> modem for the C64. Works well.
>
> Cheers
>
> Geoff Roberts
> Computer Systems Manager
> Saint Mark's College
> Port Pirie, South Australia.
> Email: geoffrob_at_stmarks.pp.catholic.edu.au
> netcafe_at_pirie.mtx.net.au
> ICQ #: 1970476
>
>
>
>
Received on Mon Dec 06 1999 - 23:04:53 GMT