TITLE    : Terminal/Printer cable for the 128-port RAN
OS LEVEL : None 
DATE     : 25/05/99
VERSION  : 1.0

----------------------------------------------------------------------------
         
                                          ________________________
                                         |    Cabling Options     |
         Cable Ran End            _______|________________________|__________
             ______              |Ran End|     |     |     |      |  Device  |
      ______|      |_______      | RJ-45 | 4Pin|6Pin |8Pin |10pin |  DB-25   |
     |______|______|_______|     |_______|_____|_____|_____|______|__________|
     |                     |     | RI  1       |     |     |  1_______22 RI  |
     |_#_#_#_#_#_#_#_#_#_#_|     |                                           |
10pin. 1 2 3 4 5 6 7 8 9 10      | DSR*2                1_____2_______20 DTR |
 8pin... 1 2 3 4 5 6 7 8         |                               |           |
 6pin..... 1 2 3 4 5 6           | RTS 3          1_____2_____3_ | ____5 CTS |
 4pin....... 1 2 3 4             |                               |           |
                                 | GND 4____1_____2_____3_____4_ | ___Sh GND |
                                 |                               |           |
                                 | TD  5____2_____3_____4_____5_ | ____3 RD  |
                                 |                               |           |
    1   Cable Device End   13    | RD  6___ 3_____4_____5_____6_ | ____2 TD  |
   _|_______________________|_   |                               |           |
  | . . . . . . . . . . . . . |  | SG  7____4_____5_____6_____7_ | ____7 SG  |
   \ . . . . . . . . . . . . /   |                               |           |
    \|_____________________|/    | CTS 8          6_____7_____8__|_____4 RTS |
     |     Male DB-25      |     |                               |           |
    14                    25     | DTR 9             :  8 ____9_ | ____6 DSR |
                                 |             :     :           |  |        |
                                 | DCD*10      :     :     : 10__|  |__8 DCD*|
                                 |_____________|_____|_____|_________________|

                                  
* The physical location of DSR and CD may be swapped with the ALTPIN parameter
  when enabled using the stty-cmxa commar.

ALTPIN Modem Wiring for RJ-45 Cabling

The 10-pin RJ-45 plugs is not the predominant cabling subsystem and may be 
difficult to obtain in the retail market. The AIX TTY subsystem provides an
optional feature called ALTPIN, which swaps the logical functions of DSR 
(Data Set Ready) with DCD (Data Carrier Detect) for a port. When ALTPIN is 
enabled, DCD becomes available on pin 1 of an 8-pin RJ-45 connector 
(equivalent to pin 2 of a 10-pin connector).