Path: utzoo!mnetor!tmsoft!torsqnt!lethe!yunexus!ists!helios.physics.utoronto.ca!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!hayes!tnixon
From: tnixon@hayes.uucp
Newsgroups: comp.dcom.modems
Subject: Re: Intel 9600ex
Message-ID: <3790.27c252f2@hayes.uucp>
Date: 20 Feb 91 10:44:02 GMT
References: <4028@gazette.bcm.tmc.edu> <3186@unocss.unomaha.edu> <3779.27bbbc87@hayes.uucp> <1991Feb19.192422.10642@rand.org>
Organization: Hayes Microcomputer Products, Norcross, GA
Lines: 25

In article <1991Feb19.192422.10642@rand.org>, edhall@rand.org (Ed
Hall) writes: 

> Gee, it can take more than three seconds just to get the handset
> seated in the acoustic coupler.  (Yes, there are still some of THOSE
> around.)  Some folks *insist* on waiting for the answer tone
> themselves, just in case a real person answers instead.  Mustn't be
> rude, now, mustn't we?

But you do NOT have V.22bis, V.22, or Bell 212 acoustic couplers!  
These modulation schemes simply don't work well, if at all, through 
acoustic connections.  Nevertheless, the Automode specification 
requires the answering modem to send the full 4 seconds of answer 
tone -- a human being should be able to get the handset in the 
cradle, or put a manual dial modem into data mode, or lift and 
exclusion key, in that amount of time, plus the three seconds of 
USB1 that are sent.  Most acoustically-coupled modems at Bell 103 or 
V.21, and these modulation schemes are not even tried until about, 
oh, ten seconds into the connection.

-- 
Toby Nixon, Principal Engineer    | Voice   +1-404-840-9200  Telex 151243420
Hayes Microcomputer Products Inc. | Fax     +1-404-447-0178  CIS   70271,404
P.O. Box 105203                   | UUCP uunet!hayes!tnixon  AT&T    !tnixon
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