Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!cs.utexas.edu!sun-barr!ccut!wnoc-tyo-news!astemgw!kuis!aegis!davidg
From: davidg%aegis.or.jp@kyoto-u.ac.jp (Dave McLane)
Newsgroups: comp.dcom.modems
Subject: Re: Controlling answer tone sequence
Message-ID: <PRoiZ3w163w@aegis.or.jp>
Date: 27 Mar 91 11:36:36 GMT
References: <3885.27f003d8@hayes.uucp>
Organization: Aegis Society
Lines: 26

tnixon@hayes.uucp writes:

> To the best of my knowledge, virtually ALL modems will, when being
> used to originate a call, change speeds to match the capabilities of
> the answering modem, unless they've been specifically configured to
> disable this feature.  All Hayes modems do.

Thanks for the info.

> Older (pre-V-series) Hayes modems behaved like your USR -- once they
> answered a call at a lower speed, that speed became the maximum for
> future calls if the modem didn't receive a command from the DTE at a
> higher speed in the meantime.  We learned, however, about systems
> like Unix and other applications that CAN'T issue commands to the
> modem between calls, and so changed the behavior of our modems so
> that between calls they switch back to the speed of the last AT
> command issued rather than the speed at which the last call
> connected.  Many other manufacturers have done the same thing, but
> not all.  Of course, with the V-series modems, you can set an
> S-register to specify the maximum connect speed rather than it being
> dependent on the AT command speed.

If so, then I can't use my USR (or any modem that behaves in a similar
fashion).

--Dave