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From: myers@andromeda.RUTGERS.EDU (Scott R Myers)
Newsgroups: comp.dcom.modems
Subject: Re: Hayes 1200/new features
Message-ID: <370@andromeda.RUTGERS.EDU>
Date: Sat, 9-May-87 07:48:03 EDT
Article-I.D.: andromed.370
Posted: Sat May  9 07:48:03 1987
Date-Received: Sun, 10-May-87 02:47:54 EDT
References: <3521@gitpyr.gatech.EDU> <2986@well.UUCP> <491@paul.RUTGERS.EDU>
Reply-To: myers@andromeda.UUCP (Scott R Myers)
Organization: Rutgers University, Newark, NJ
Lines: 15
Keywords: Busy signal detection

In article <491@paul.RUTGERS.EDU> dpz@paul.RUTGERS.EDU (David P. Zimmerman) writes:
>There are two Hayes 1200s, pre- and post-Hayes 2400 (Hayes should have
>differentiated them with a different product name, like the 1200xr4ti
>:-) or something).  The pre-2400 1200s don't have the nifty busy
>signal detection, etc. that the 2400 has, while the post-2400 1200s
>do.
>

One way to tell the difference with later and older revision Hayes is to
examine the back of the unit...  The later revisions all have two phone jacks
, one for line the second for the phone line...  Also if your modem is hooked
up the commands for enabling busy signal detection ar ATXy where y represents
a number from 1 to 4...  I'm not sure at the moment but I believe 4 is the
correct number for that feature...
The new Hayes also support TRUE dial tone detection.