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From: cetron%utah-ced@UTAH-CS.ARPA (Ed Cetron)
Newsgroups: mod.computers.vax
Subject: Re:  set host/dte
Message-ID: <8610311629.AA08500@utah-ced.ARPA>
Date: Fri, 31-Oct-86 11:29:00 EST
Article-I.D.: utah-ced.8610311629.AA08500
Posted: Fri Oct 31 11:29:00 1986
Date-Received: Mon, 3-Nov-86 20:57:07 EST
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The ARPA Internet
Lines: 45
Approved: info-vax@sri-kl.arpa

on a case like this, a breakout box is essential.....

	BUT, from memory, a lot of hayes modems DO NOT put out all of the modem
control signals that a vax wants/desires and ,again from memory, I thought that
the simplest way to do this is via brute force (after all this is an emergency)


	wire cable as follows:

	modem			vax
	  1 -------------------- 1		(use 1 AND 7, some modems use
	  7 -------------------- 7                 others 7)

	  2 -------------------- 2
	  3 -------------------- 3

	  4 -                  - 4		(some modems/ third party muxes
	    |                  |    		   require rts/cts - able mux-
          5 -                  _ 5		   master for instance)

	  6 -		       - 6
	    |		       |	
	  8 -		       - 8
	    |                  |
	 22 -                  - 22		(tie these together and then
	    |		       |
	 20 -                  - 20			tie them to each own's
							20...)

	a little less brute force (if the modem DOES generate the right signals
is to send (6,8,22) to the OTHER sides 20......

-ed cetron

ps. 
	1 Prot gnd
	2 tx
	3 rx
	4 rts
	5 cts
	6 dsr
	7 sig gnd
	8 cd (rlsd)
	20 dtr
	22 ri