Path: utzoo!attcan!uunet!tut.cis.ohio-state.edu!snorkelwacker!usc!zaphod.mps.ohio-state.edu!mips!pacbell.com!pacbell!hoptoad!hsfmsh!daemon
From: tnixon@hsfmsh.UUCP (Toby Nixon)
Newsgroups: comp.dcom.modems
Subject: Re: 9600 MNP5 Sites Needed to test my Incomm 9605
Message-ID: <3466@hsfmsh.UUCP>
Date: 8 Jul 90 04:55:29 GMT
Sender: daemon@hsfmsh.UUCP
Organization: Hayes Microcomputer Products, Inc.  Norcross, Georgia
Lines: 31

In article <63547@sgi.sgi.com>, Fan Jiao writes:

- So I really want to some BBS numbers with V3.2 support so that I can
- test that thing.  Also does somebody out there know how to tell the
- answering modem is of V3.2 or not? 

Most, if not all, of the modems on the Online with Hayes BBS are 
Hayes Ultra 96 (V.32/V.42bis/MNP5) modems.  You can call on 
1-800-US-HAYES, or 1-404-446-6336.

You can tell if the answering modem has V.32 if the 2100Hz answer 
tone (the initial, 4-second-long tone you hear from the modem) has 
phase reversals (sound like clicks) every one-half second.  A 
non-V.32 modem will give you a smooth answer tone without the phase 
reversals.  The purpose of the phase reversals is to cause echo 
cancellers in the long distance telephone network to be disabled, 
because V.32 modems provide their own echo cancellation.

The phase reversals in the answer tone are optional in V.32, but 
virtually all V.32 modems do it.

	-- Toby

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Toby Nixon, Principal Engineer     Fax:    +1-404-441-1213  Telex: 6502670805
Hayes Microcomputer Products Inc.  Voice:  +1-404-449-8791  CIS:    70271,404
Norcross, Georgia, USA             BBS:    +1-404-446-6336  MCI:       TNIXON
                                   Telemail: T.NIXON/HAYES  AT&T:     !tnixon
UUCP:   ...!uunet!hayes!tnixon     Internet:        hayes!tnixon@uunet.uu.net
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