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From: gnn@manray.Berkeley.EDU (George Neville-Neil)
Newsgroups: comp.terminals,comp.sys.zenith,comp.dcom.modems
Subject: Duplex wackiness between a Hayes 2400 and a Z19
Keywords: hayes z19
Message-ID: <11051@pasteur.Berkeley.EDU>
Date: 12 Feb 91 21:56:45 GMT
Sender: news@pasteur.Berkeley.EDU
Reply-To: gnn@manray.Berkeley.EDU (George Neville-Neil)
Lines: 40

Hi Folks,

	I have already called Zenith and they can't seem to find someone who
has been with them long enough to know about this so.....

	I have a zenith h19 or z19, from what I understand they are the same. 
It is connected to a Hayes Smartmodem 2400.  It is connected at 2400. 
When I issue commands to the mode there is no problem.  I.e. all AT
commands work as per usual.  The problem is that once I dial in anywhere
I get a strange kind of half-duplex mode.  I.e. I type and m and a
quarter second later there is a second m on the screen.  So if I type
the word "test" fast enough I get....

	testtest

	or some such mixture.  Now the thing is if I switch the h19 to
half-duplex I will get three letters.  I.e.

	ttteeesssttt or tteesstttest 

	if I type quickly enough.

	When the modem is connected using the same cable to a Radio Shack Model
102 everything is fine.  The cable is a 4 wire null modem.  I.e.
2,3,8,20 (or it may be 2,3,7,20) I am not sure as I am not at home at
the moment.

	Anyways.....

	Any Ideas ??

	Thanks,
	George



George Neville-Neil      What if they gave an orgy and nobody came ?
gnn@mammoth.berkeley.edu 

The Mammoth Project......It's HUGE !!!