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From: billw@wolf.UUCP (Bill Wisner)
Newsgroups: comp.dcom.modems
Subject: Re: modem detecting busy signal.
Message-ID: <339@wolf.UUCP>
Date: Wed, 6-May-87 09:19:54 EDT
Article-I.D.: wolf.339
Posted: Wed May  6 09:19:54 1987
Date-Received: Sun, 10-May-87 08:44:15 EDT
References: <8704291527.AA14475@ucbvax.Berkeley.EDU> <1021@wlbr.UUCP> <3766@necntc.NEC.COM>
Organization: The Obnoxio College of Netiquette
Lines: 24

<3766@necntc.NEC.COM>: jeff@necntc.NEC.COM (Jeff Janock) writes:
>In <3515@gitpyr.gatech.EDU> duke@gitpyr.gatech.EDU (Roy Brabson) writes:
>>In article <1021@wlbr.UUCP>, pete@wlbr.UUCP (Pete Lyall) writes:
>>> 'CONNECT' responses are limited to either 'CONNECT' and 'CONNECT
>>> 1200'. Additionally, there is no capacity for busy signal detect. 'Busy'
>>> or 'no answer' are the same here, i.e. 'NO CARRIER'.

>>I own a Hayes 1200, and it is fully capable of detecting a busy signal.
>>It supports X1 through X4.  Just thought I'd set the record straight. 

> Having owned a HAYES 1200 for some time and utilizing many HAYES 1200
> and HAYES (1200/2400bps) compatable modems, I have not seen a way to 
> detect a BUSY vs and NO ANSWER -

I don't know about the Hayes 1200, but there are modems, such as the
Volksmodem 12 and the ADC "Phone Modem" (what a name!) that will print the
message BUSY rather than NO CARRIER. (Actually, the ADC prints things like
"CONNECTION ESTABLISHED" and "BUSY SIGNAL" and "RING RESPONSE." Yes, it has
ring detection.) And the Novation Apple Cat does even better. Given the right
software on the Apple II, it can detect almost any kind of tone. Generate
about any kind of tone, too.
-- 
Bill Wisner
..{sdcsvax,ihnp4}!jack!wolf!billw