1 RS232
		    _________________________	     1	     Cable shield
		 1/ o o o o o o o o o o o o o \13    3 RD    Receive data
		 '--|-|-|-------|--------------`    *4 RTS   Ready to send
For IBM PC,	   1|2|3|      7|g		    *5 CTS   Clear to send
link 4 to 5	    | | |	|r     * not used   *6 DSR   Data set ready
 and 7 to 20	   s|r|b|	|e       on VAX      7	     Signal ground
		   c|e|l|	|e		   *20 DTR   Data terminal ready
		   r|d|u|	|n
		   e| |e|   .---|---.		     1 DINP  Data input
		   e| | `----.	o 2  \		     2	     Signal ground
		   n| |   /   \       \		     3 DOUT  Data output
		    | `-----o  `----o  |	    *4 HINP  Handshake input
		    |     \	      /		    *6 SINP  Status input
plugs viewed	    `------\	_    /		    *7 SOUT  Status out
from inside		    `--' `--'		 shell	     Cable shield
2 DECmate_printer
		 14/ o o o o o o o o o o o o \25     2 TD    Transmit data
		 1/ o o o o o o o|o o o o o o \13    3 RD    Receive data
		 `-/--|-|---|-|-|-\------------'     5 CTS   Clear to send
		  /   | |   | | | |		     6 DSR   Data set ready
		  |   |_|_  | | | |		     7	     Signal ground
		  |     | | | |	| |		    20 DTR   Data terminal ready
DEC cable	  |     | |_|_|_; |		    
type BCC-05	  |     |/| | |   |
		  |     ||| | |   |
		  |   __|||_|_|	  |
		  | /1o|o o o o5\ |
plugs viewed  | `-||--------' |
from inside	  `---'`----------'
2 Pin_connections_and_names
The full RS232 (D-type) and S5/8 (DIN) pin names and connections are:

	RS232					S5/8
	-----					----
 1 PG   protective ground		  = shell	cable screen
 2 TD   transmit data		      =	1 DINP	data input
 3 RD   receive data		      =	3 DOUT	data output
 4 RTS  ready to send		      =	6 SINP	status input
 5 CTS  clear to send		      =	5 HOUT	handshake output
 6 DSR  data set ready		      =	7 SOUT	status output
 7 GND  signal ground		      =	2	signal ground
 8 DCD  data carrier detect
 9      -12V test level
