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From: weiss@curtiss.seas.ucla.edu (Michael Weiss)
Newsgroups: comp.sys.mac.comm,comp.sys.mac.wanted
Subject: Re: SUMMARY: PM9600SA modem and Practical Peripherals
Message-ID: <3033@lee.SEAS.UCLA.EDU>
Date: 6 Jun 91 20:33:42 GMT
References: <1CE00001.hcngad@tbomb.ice.com> <1991Jun4.194525.14503@bronze.ucs.indiana.edu>
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In article <1991Jun4.194525.14503@bronze.ucs.indiana.edu> tagreen@lothario.ucs.indiana.edu (Todd Green) writes:
>I cannot believe that it is 9600 baud.  I would assume that it is 2400
>baud carrying 4 bits per signal change. (Hence 9600 bps) Add MNP5 and
>you get 19.2Kbps (with 2:1) compression.  Add v42bis and you get 38.4K
>(with 4:1) compression.  How do you other people arrive at 9600 baud?

I'm sure I'm not the only one who will point this out.  
True, it is not 9600 baud, but it has happened generally that people confused
baud with bits per second.  The maximum baudrate at full duplex is 600 baud
without echo cancellation, 1200 baud with.  By adding phase-shifting, that
1200 baud with 1200 bps can be upped to 1200 baud with 9600 bps.  Also, it
should be noted that 1200 and 2400 bps modems did not achieve those speeds
through echo cancellation, but rather through phase-shifting a 600 baud
carrier.
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-  Michael  weiss@seas.ucla.edu   |  School of Engineering & Applied Science  -
-   Weiss   izzydp5@oac.ucla.edu  |   University of California, Los Angeles   -
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