Need information on 3B2-300 ports.

[Gunsul]

In article <297 at gcc.uucp>, smiley at gcc.uucp (Wise men still seek Him) writes:
> I am in the process of obtaining hardware documentation for an AT&T
> 3B2-300, but am in need of a minor piece of information before I receive
> it.
> 
> I need descriptions of the console terminal port pinouts and the terminal
> port printouts (if they are not the same).
> 
> This information will permit me to bring up the system and examine what 
> is on it.
> 
> Thanks in advance for any responses.
> 
> Jim Smiley

	8-Pin			25-Pin			25-Pin
       Modular		     Jack or Plug	     Jack or Plug
	Jack		   Printer or Terminal	      ACU MODEM
	____		       ________		       ________
    1 Prot Grd		   1 Frame Ground	     1 Frame Ground
    2 Reserved		   4 Reserved		     5 Reserved
    3 TXDO		   3 Transmit Data	     2 Transmit Data
    4 DTRO		   8 Data Term. Ready	    20 Data Term. Ready
    5 RXDO		   2 Receive Data	     3 Receive Data
    6 DCDO		  20 Data Carrier Det.	     8 Data Carrier Det.
    7 SIG GRD		   7 Signal Ground	     7 Signal Ground
    8 RESERVED		   5 Reserved		     4 Reserved
	|			\			/
	|			  \		      /
	|			    \               /
	|			      \           /
        \/

      |----------|                 \--------------------------------/
pin 8 | |||||||| | pin 1	  1 \   . . . . . . . . . . . . .  / 13
      |          |		      \  . . . . . . . . . . . . /
       |        |                 14    \______________________/  25
        |______| 			        F R O N T

     MODULAR JACK ON
      3B2 COMPUTER

All ports on the 3B2 are (Console, Ports board, EPORTS, etc) are wired the
same as shown above.

Phil