Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!samsung!uunet!postmod!andrew
From: andrew@postmod.UUCP (Andrew J Richardson)
Newsgroups: comp.sys.amiga.datacomm
Subject: Re: Telebit vs. USR
Message-ID: <1886cb88.ARN07ec@postmod.UUCP>
Date: 15 Jan 91 18:58:32 GMT
References: <1991Jan15.021116.23778@athena.mit.edu>
Reply-To: andrew@postmod.UUCP
Followup-To: comp.sys.amiga.datacomm
Organization: fredd's Famous Computers
Lines: 41

In article <1991Jan15.021116.23778@athena.mit.edu>, Richard L. Carreiro writes:

-> Ok, a few questions....
-> A) what are V.32, V.32bis, V.42, and V.42bis

v.32: telecommunications protocol to run data transfer at 9600 bps.
v.32bis: protocol to run at 14400 bps (contrary to some claims, has NOT been
         finalized.  no guarantee that modems produced today will be FULLY
         compliant with the standard when finalized).
v.42: error control protocol, packetized, includes lap-m with mnp 1,2,3,4
      as a fall-back
v.42bis: data compression algorithm protocol, includes mnp 5 as a fallback.


-> B) which of these does Telebit support?

the telebit t1600 supports v.32, and i _think_ both v.42's
the telebit t2500 supports all four plus pep, a proprietary protocol for
data transfer of up to 19200 bps, using a lempel-ziv compression algorithm.

-> C) which of these does USR support?

don't know, don't own one.

-> D) does Telebit support any MNP stuff?  Does USR?

as above, the t2500 includes v.42 and v.42bis, which themselves use mnp 1-5
as fallbacks.  this ensures compatability with the large group of mnp
capable modems already in use.  other telebit modems may include mnp, such
as the traiblazer+, which includes mnp 1,2,3,4.

-> Much thanks, as a Telebit or USR purchase is in my
-> immediate future, and I'm trying to decide which to get...

good luck!


---andrew

andrew@postmod.uucp
uunet!postmod!andrew