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From: bshafer@udenva.UUCP (bshafer)
Newsgroups: net.dcom
Subject: Help with selecting site dial-in modems.
Message-ID: <2362@curly.ucla-cs.ARPA>
Date: Thu, 23-Oct-86 14:49:36 EST
Article-I.D.: curly.2362
Posted: Thu Oct 23 14:49:36 1986
Date-Received: Sun, 26-Oct-86 03:58:35 EST
Reply-To: bshafer@udenva.UUCP ()
Organization: U of Denver
Lines: 34
Keywords: Rack mountable 2400 baud modems, MNP, X.25

We will be replacing some very ancient dial-in modems (some of them 14
years old) in the next few months and I am seeking information and 
others' experiences with dial-in modems.

Our criteria are reliability, reasonable price, maintainability and good
vendor support.

We would like a rack mountable 2400 (V.22 bis, V.22 A or B), 1200
(Bell 212A) and 300 (Bell 103) compatible modem.  We would like
it to support originate/answer and autodial (Hayes protocol is ok but not
essential).  They will be placed on our MICOM data switch and pooled for
both incoming and outgoing calls to/from our VMS and Un*x VAXen.

We need 24 to begin with and would be interested in selling the standalone
compliment(s) in our Computer Store.

The issue of error correction is unclear to me.  Not the need so much as
the how.  Almost everyone is now selling modems with various levels of MNP.
My question is why choose a proprietary protocol over something
like X.25?  (Yes somebody does make an X.25 2400 baud dial modem - I think
it is General Datacomm).  It also occurs to me that these protocols are
more than likely burned into PROMs.  If that is the case, are any of the
vendors suggesting that if something other than the protocol they sell
becomes the standard that they will have a cheap upgrade path?

I would appreciate any advice and I give my thanks in advance.  If I
get enough responses I will post a summary to the network.
-- 
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Bob Shafer		| ... {hplabs, seismo}!hao--\
CaIR			| ... ucbvax!nbires----------> !udenva!bshafer
University of Denver	| ... {boulder, cisden}-----/
Denver,	Colorado  80208 | Phone: (303)871-2091
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