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From: minich@unx2.ucc.okstate.edu (Robert Minich)
Newsgroups: comp.sys.mac.misc
Subject: Re: Wiring for hayes modem w/handshaking
Message-ID: <1991Mar24.234125.7088@unx2.ucc.okstate.edu>
Date: 24 Mar 91 23:41:25 GMT
References: <1991Mar24.192306.11160@eng.umd.edu>
Organization: Oklahoma State University Computer Center
Lines: 17

ogawa@orion.arc.nasa.gov (Arthur Ogawa) writes:
: 
|>Interestingly enough, the NeXT's serial port is RS-423, rather than
|>RS-422, as in the Mac. The former supports the four independent handshaking
|>signals.
 
by russotto@eng.umd.edu (Matthew T. Russotto):
| How many pins on the NeXT's port?  In order to support four handshaking
| signals, you need at least 9 pins.
| (TxD+, TxD-, RxD+, RxD-, CTS, RTS, DSR, DTR, Gnd)

Not if you don't use differential signals.
-- 
|_    /| | Robert Minich            |
|\'o.O'  | Oklahoma State University| "I'm not discouraging others from using
|=(___)= | minich@d.cs.okstate.edu  |  their power of the pen, but mine will
|   U    | - "Ackphtth"             |  continue to do the crossword."  M. Ho