Path: utzoo!censor!becker!hybrid!scifi!bywater!uunet!hayes!tnixon
From: tnixon@hayes.uucp
Newsgroups: comp.dcom.modems
Subject: Re: HST waiting for "bong" tone
Message-ID: <3733.27959026@hayes.uucp>
Date: 17 Jan 91 11:53:10 GMT
References: <15668@sdcc6.ucsd.edu>
Distribution: usa
Organization: Hayes Microcomputer Products, Norcross, GA
Lines: 31

In article <15668@sdcc6.ucsd.edu>, bruno@sdcc10.ucsd.edu (Bruce W.
Mohler) writes: 

> Does anyone know if is possible to get a USR Courier HST to
> pause for a "bong" tone (the tone you get after you enter a
> telephone number with a leading "0" after which you can
> enter your calling card number)?  

The "@" dial modifier is defined (in Hayes products, anyway) as 
"Wait for Quiet Answer".  The purpose is to allow you to call into 
systems (such as PBXes with DISA [Direct Inward System Access]) 
which give you a tone then wait for you to dial a number.  Well, 
this is essentially what the "bong" tone is.  The "@" dial modifier 
listens for some call progress tone (usually, a ring signal), 
followed by five seconds of silence (because rings are usually four 
seconds apart).  In most Hayes modems, the "@" will trigger this 
five-second timer when it hears a "bong" tone, and, when the timer 
expires, go on and dial.  So, it _can_ be used as a "wait for bong 
tone", with your credit card number following, so long as the 
operator doesn't come on the line within the five-second period.  
Some used to, but I haven't had any trouble in quite a while with
AT&T operators coming on the line within the five seconds.

I don't know if USR uses the same criteria for triggering their "@" 
dial modifier, but it wouldn't hurt to try.

-- 
Toby Nixon, Principal Engineer    | Voice   +1-404-449-8791  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
Atlanta, Georgia  30348  USA      | Internet       hayes!tnixon@uunet.uu.net