Serial Cable Information/Configuration

 


           

  *************************************************************

              Serial Cable Information/Configuration

  *************************************************************

 

  The following information is provided for those who wish to

  make their own serial cables. The various manufactures and

  possible conditions of serial requirements are not always

  standard. However some basic possible configurations are made

  here to save your sanity. Trial and error maybe necessary to

  configure for the final working cable setup.

 

  Possible equipment necessary for easier making of your cables

  are listed as follows:

 

  1. Serial breakout box

  2. Small screwdriver

  3. Gender changer (read NOTE3)

  4. Universal 25 pin flat cable

 

  If you don't have the above, just make do.

 

 MODEM ADAPTOR    NULL MODEM   NO HANDSHAKE FULL HANDSHAKE

  pin - pin         pin - pin     pin - pin      pin - pin

  1      1          1      1      1      1       1      1

  2      3          2      3      2      3       2      3

  3      2          3      2      3      2       3      2

  4      4          4)     4)     7      7       4      5

  all wired         5)     5)     5)     5)      5      4

  25     25         7      7      6)     6)      7      7

                    6)     6)     8)     8)      6----\ 8)

                    8)     8)     20)    20)           \20)

                    20)    20)                   8)\

                                                 20)\----6

 

  Let me explain the above configurations:

  -------------------------------------------------------------

 

  )     = jumpered to numbers with it immediately followed

  8 - 8 = are connected

  \--   = are connected plus jumpered

 

  *NOTE1* Those numbers jumpered are not connected unless

   stated so and are at the same DB-25 connector end.

  *NOTE2* The modem adaptor is bested used when a printer cable

   was the means of serial connection and is no longer

   being used, but a modem is.

  *NOTE3* The DB-25 pin connectors are either male or female

   types, make sure of your needs before proceeding.

   Gender changers reverse the types of connector ends.

 

  DISCLAIMER - No responsibility is warranted for use of this

               information.

  GOOD LUCK -----Bill Rena

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