_________________________________
          Modem End                 |                                 |
   1      Male DB-25      13        |  Modem End     |       Ran End  |
  _|_______________________|_       |  DB-25 Male    |  HD-15 Female  |
 | . . . . . . . . . . . . . |      |  Signal        |        Signal  |
  \ . . . . . . . . . . . . /       |________________|________________|
    |_____________________|         |                                 |
   14                    25         | RxD   3 _______________  6  RxD |
                                    |                                 |
                                    | RxC  17 _______________  9  RxC |
                                    |                  |              |
          Device End                |                  *              |
           1                        |                  |_____ 10      |
         __|__________              |                                 |
        |  o o o o o  |             | TxD   2 _______________  1  TxD |
      6-- o o o o o   |             |                                 |
         \ o o o o o /              |  TxC 15 _______________  4  TxC |
           |_______|                |                  |              |
          11       15               |                  *              |
                                    |                  |_____  5      |
                                    |                                 |
                                    |   SG  7 _______________ 12   SG |
                                    |                                 |
                                    | FGND Shell,1 _______ Shell FGND |
                                    |                                 |
                                    |       4 ___                     |
                                    |            |                    |
      * = 2200pf Capacitor          |       6 ___|                    |
                                    |            |                    |
                                    |      20 ___|                    |
                                    |                                 |
                                    |_________________________________|


              24 AWG - max12.5pF/f  - type Belden 9929 or equivalent
         Controller line baud rates of 19.2 Kbps or less are recommended.


        ... WHERE USED

   __________________           _____
  | 128-Port        1|____NE___|Modem|------ - ,
  | Adapter         2|         |_____|         |
  |_______          _|                         |
          ||||||||_|         .-----TEL LINES - '       _____   ________
                             |   _____                |     | |        |
                             '--|Modem|______NF_______|    _|_|_       |
                                |_____|                   |Node1|      |
                                                          |_____|     _|_T_
                                                                     |Node2|
                                                                     |_____|