Path: utzoo!attcan!uunet!lll-winken!lll-lcc!ames!mailrus!nrl-cmf!ukma!amir
From: amir@ms.uky.edu (Amir Sadr)
Newsgroups: comp.dcom.modems
Subject: Re: Question- External Hayes 2400 SM
Message-ID: <9629@f.ms.uky.edu>
Date: 10 Jun 88 18:30:25 GMT
Reply-To: amir@ms.uky.edu (Amir Sadr)
Organization: U of Kentucky, Computer & Mathematical Sciences Division
Lines: 36

In article <9590@f.ms.uky.edu> amir@ms.uky.edu (Amir Sadr) writes:
<I have an external Hayes SmartModem 2400 which I purchased new almost
<two years ago.  Since the first day I used this modem, I noticed one
<problem with it.  At 2400bps the modem dials out, connects and operates
<properly.  However at 1200bps mode, the modem will not carrier detect
<unless the line rings at least for 0.5 seconds.
<
< . . . etc . . .
<                          Also at 2400bps, if the call is answered without a
<ring, synchronization takes a bit longer than otherwise. All this implies that
<at 1200bps occasionally I may have to try more than once to get a connection
<(Rarely more than twice).
<  etc.
<My question is, has anyone else using this particular modem ever experienced
<this problem?  Is it a hardware problem, or can it be fixed by fiddling
<with some of the modem register settings?  If so, which one(s) & to what?
<As always, many thanX in advance for any help or leads.
<Amir-
<

Thanks to Daniel Stone of Purdue University, I discovered that the above
problem is not hardware related (thank goodness).  I appreciate the help
and suggestions of everyone else who responded (in case my E-mail letter
did not make it to you).  For others who may be having the same problem
with their Hayes SM 2400, I suggest you try do reset registers 6 & 7 to
your needs.  As with my particular problem, a fix was made by simply
reducing S7 from 30 Secs. to 10.  There was no need to change S6 = 2 Secs.
All the above problems have now disappeared and the modem operates
properly.  Again, thanX to everyone for their assistance.
Amir-


-- 
- Amir Sadr,  Dept. of Computer Science          amir@ms.uky.edu
- University of Kentucky                         amir@ukma.BITNET
- Lexington,  KY 40506-0046                      [rutgers,uunet]!ukma!amir
--