Path: utzoo!utgpu!watmath!softart!ashok
From: ashok@softart.UUCP (Ashok C. Patel)
Newsgroups: comp.dcom.modems
Subject: Re: comp.dcom.modems
Message-ID: <47@softart.UUCP>
Date: 6 Dec 88 03:04:52 GMT
References: <11218@reed.UUCP> <12093@cup.portal.com>
Organization: Softart Microsystems Inc., Waterloo Ont. Canada
Lines: 22

> > Practical Peripherals 2400. Both claim to support some CCITT protocols, but 
> > are they the right ones? I know very little about digital communications
> > outside the USA,
> 
> the PM2400SA (Practical Peripherals) does support CCITT v.22 bis which is the
> American standard (equivalent of Bell 212A at 1200 and Bell 103 (I think) at
> 300 bps) for telecommunications at 2400 baud...
> 

It is my understanding (correct me if I'm wrong, I'd like to get straight
on this as well...) that V.22bis is the world wide standard for 2400 bps
modulation.  It is a variation on V.22 which is the modulation standard used
in Europe for 1200 bps.  Bell 212A is used in North America and it is not
much different from V.22 but different enough.  Most modems that work at
2400 bps will also support V.22 as well as Bell 212A.  On the Microcom modem
it is controlled by an AT command.  If you want to communicate with
Europe at 1200 bps, than you want V.22.  At 2400 bps, it doesn't matter (I
LOVE world wide standards!).

-------------------------
Ashok C. Patel
Softart Microsystems Inc.