Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!utgpu!water!watmath!clyde!rutgers!gatech!mcnc!ecsvax!dmkdmk
From: dmkdmk@ecsvax.UUCP
Newsgroups: comp.dcom.modems
Subject: Re: modem detecting busy signal.
Message-ID: <3024@ecsvax.UUCP>
Date: Thu, 30-Apr-87 14:58:16 EDT
Article-I.D.: ecsvax.3024
Posted: Thu Apr 30 14:58:16 1987
Date-Received: Fri, 1-May-87 06:36:11 EDT
References: <8704291527.AA14475@ucbvax.Berkeley.EDU>
Organization: University of North Carolina at Greensboro
Lines: 44
Summary: May be partially the phone service....

In article <8704291527.AA14475@ucbvax.Berkeley.EDU>, TNETE1NN@CLVM.BITNET writes:
> I have a Capetronic 1200 modem.  It is said to be fully Hayes
> compatible and I haven't had any trouble with it until now.
> If I call a number and it rings, it says "CONNECT ..... RING RESPONSE".
> However, if there is a busy signal, 90% of the time it says the same thing.
> Only once in a blue moon, after trying it repeatedly, will it
> finally disconnect (after about 3 busy signals) and wait 30 sec.'s and
> try again.  This is what it is supposed to do.  Can anyone understand
> this?  Maybe it's defective - but this is the ONLY thing that's a problem.
> Thanx,
> Mike Rickenbach
> TNETE1NN@CLVM

I have had similar problems with my Hayes compatible modem, and also
know of some folks that have the same happen with a genuine Hayes.  It
appears from what I personally observed, that it depends on the 
connection that the local phone cos. provide.  I have been using mine
for the past few months in Greensboro, NC which is serviced by Southern
Bell.  A call to any number is usually very quick and quiet, i.e.: no
clicking noises in the background.  When the actual connection takes 
place, you don't "hear" the CLICK either.  When I reach a number that
is busy in this case, it will give me the "REDIAL... WAITING 30 SEC"
message.  On the other hand, I have also used my modem at my New Jersey
residence in an area served by United Telephone.  I believe that we are
one of the few exchanges (possibly in the whole world! :-) that still
is on the old mechanical switching devices.  Anyways, when I dial a
number there, I hear lots of clicking and finally one loud click when
the connection is complete.  At this point, I get a "RING RESPONSE"
message, *before* the other end even rings or sends a busy signal!
Occassionally, even when I call from my NC residence to a long-distance
number, the same happens - but this is more of an exception rather than
the rule here.  But *ALWAYS* from NJ this is the case.  I'm not by 
telecommunications technologies expert, but have noticed this is often
the situation where this happens.  Another thing I do know is that upon
connection, the Tel Co's central office sends reverse battery, that may
be another cause.  Perhaps someone out there in net-land could shed
some light on the techincal aspects of this, I for one would like to
know more about it.  Hope this is of some help.
---
David M. Kurtiak
UNC - Greensboro
UUCP: {decvax,seismo}!mcnc!ecsvax!dmkdmk  -or-
      {ihnp4}!allegra!ulysses!ecsvax!dmkdmk
BITNET: DMKDMK@ECSVAX