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From: Carra_its-me_Bussa@cup.portal.com
Newsgroups: comp.dcom.modems
Subject: PEP vs MNP vs v.32 (& v.42bis)
Message-ID: <32867@cup.portal.com>
Date: 16 Aug 90 04:38:20 GMT
Distribution: usa
Organization: The Portal System (TM)
Lines: 29

(Sorry if this is a rehash, but I can't exactly find any comparisons....) 

I'm planning on getting a high-speed modem.  There SEEM to be 3 types:

USR HST modems using MNP 5 (giving 19.2)
v.32 modems using v.42bis (Hayes V-series & others)
Telebit PEP modems

HST (5+) uses compression to increase their speed over the single carrier.
V.32 runs at 9600 FDX, w/v.42bis to double it's speed over the single carrier.
PEP uses multiple carriers (unlike Hayes/USR HST) and can slowly(?)
     lower the baud and/or change working carriers as the line changes.

USR has the dual v32/HST modem; Hayes has the Ultra modem.  Both of these
do MNP5 and v.32, and can talk to each other (right?)

The telebit modems use PEP, but the 1000 is PEP 9600, the + is 9600/v.32,
and the 2500 is PEP/v.32/HST (?)  (MNP 5??)

So I can use the (external?) T2500 and talk to any modem known to man?

Just trying to get my facts straight before I plunk down a megagram of pennies

Thanks!

Carra Bussa @ cup.portal.com

(If this is a known subject, just email me.  If lots of requests appear, I'll
summarize.)