Path: utzoo!attcan!nebulus!root
From: root@nebulus.UUCP (Dennis S. Breckenridge)
Newsgroups: comp.dcom.modems
Subject: Re: MNP Auto-Reliable + getty: happy accident or design?
Summary: MNP
Keywords: MNP Baud Rate Locking
Message-ID: <827@nebulus.UUCP>
Date: 27 Apr 89 01:18:29 GMT
References: <13575@steinmetz.ge.com> <260@jwt.UUCP> <565@aablue.UUCP> <135@tslanpar.UUCP>
Distribution: na
Organization: Alchemy Mindworks,Toronto,Ontario
Lines: 44

In article <135@tslanpar.UUCP>, ram@tslanpar.UUCP (ram) writes:
> In article <565@aablue.UUCP>, jb@aablue.UUCP (John B Scalia) writes:
> > In article <260@jwt.UUCP> john@jwt.UUCP (John Temples) writes:
> > >Don't MNP modems let you lock the interface speed to the computer like the
> > >Trailblazer does?  Seems like this would eliminate the problem, since getty
> > >only has to deal with one baud rate.
> > 
> > They should be able to do this. I can only speak for Multitech units, but as
> > the owner of a 224EH with MNP 5, I know it can be locked at a fixed speed to
> > communicate with the CPU.
> 
> Microcom's AX line of modems also allow the serial port to be set to a fixed
> speed.  I currently have my 9624s set to run the serial port at a constant
> 19.2 Kbaud.  And yes, it does eliminate the problem with getty.
> 
> Regards,
> Richard Meesters

I have to agree with Richard. The MNP modems that are available from the 
vendor world implement MNP class 1-x. From my expirience I have found that
the only modems that do a good job of MNP protocol are MICROCOM modems (hence
the name Microcom Network Protocol). In a series of tests performed with 
Microcom, Telebit, AT&T 2224CEO, AT&T2296, Racal Vadic and others I have
found that the Microcom is a clear winner. I get consistant 1500 chrs/sec
on a uucp transfer. The MC9624 will talk to ANY other modem that I connect
to without ANY problems or magic dialer scripts (try a TB+ to a 3B1). The 
TB+ locks the baud rate both in and out, the MC9624 locks incomming only
and autobauds on outgoing. My site consists of 4 9624's, 1 AT&T 2224CEO and
1 TB+. I have had many lock ups on the TB+ (power it down and up to clear it)
I used the AT&T modem to talk to AT&T (note the path). All of my downstream
sites use Microcoms. They just work! They are simple to set up (try that 
with a TB+). I really don't know why the U.S. usenet sites selected TB+'s 
other than price. There is no standard modem yet for usenet here in Canada
and I would like to see Microcom get a fair shake. 

-- 
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