hooking a motorola cellular phone to a computer.
==============================================================================
Motorol Transciever,s
_____________________
4500x,4800x,6800x,Etc.
______________________
Female 25 Pin                                Male 25 Pin
D-Connector                                  D-connector
To transciever                               To P.C.Parallel Port
          Pin                                     Pin
          1._____________________________________  4.
          2._____________________________________ 18.
                                     ___10k______ 13.
                                    / 
  ______4+5._______________________/____10K______ 12.
 |       12.____________________________________/
 |       11._____________________________________ 13.
 |       18._____________________________________  1.
 |       21._____________________________________  2.
 |    ___14+17+20+23.____________________________ 18.
 |    |
 |    |___ -ve
 |
 |________ +ve 9 Volt


Motorola 8500x 8800x(early type)
________________________________

25 Pin D-plug(P.C.lpt1)           Phone Back(battery removed)

Pin          Diode,s         []    []    []      []    []    []
 3.--orange-|<1n4001---------------------/       /           / 
 4.--blue---|<1n4001----------------------------/           / 
 2.--red----|<1n4001---------------------------------------/


                             []    []    []     []     []    []
18.--black-------------------/     /            /      /
13.--yellow-----------------------/            /      /
12.--brown------------------------------------/      /
 1.--grey-------------------------------------------/



                             []                              [] 
                         -8 to -12V.                     +8 to =12V.
NOTE Diode protocol: Kathode---|<diode---Anode

Motorola 9800x Personal tac1 etc.
25 pin D-plug(P.C. LPT1)                     Phone Back(battery removed)

Pin            Diode,s             Battery terminals--> [] [] []
                                                           |
 2.--black----|<1n4001-------------------------------------|
                                                            \
                                                             \black fly lead

                             Data plug---> |    |    |    |    |    |    |    |
                                           |    |    |    |    |    |    |    |
                                         white  /   blue  /  yellow     red
                                          /    /    /  green  /         /
                                         /    /    /    /    /         /
18.--white----Neg 8-12V-----------------/    /    /    /    /         /
             +8 to +12V---------------------/    /    /    /         /
13.--blue---------------------------------------/    /    /         /
12.--green------------------------------------------/    /         /
 1.--yellow---------------------------------------------/         /
 4.--red------|<1n4001-------------------------------------------/

NOTE Diode protocol: Kathode---|<diode---Anode

NEC 9A
______                           __                             __
                                 ||                             ||
 25 Pin D-Plug(LPT1)             ||                             ||
____________________             ||                             ||
                                 ||                             ||
Pin                             _||__________         __________||__
  1.green                       |           |         |            |
  6.-|<1n4148------             | phone     /          \  phone    |
  8.-|<1n4148--   |             |          /            \          |
              |   |             |          |            |          |
              |   |      back-->|          |<---front-->|          |<--back
 10.-----------   |             |          |            |          |
 13.-----------------red        |          \            /          |
 15.------blue                    | | | |                 | | | |
 18.------black                       |                     / |  \
                                      |                    /  |   \
                                    black             blue/ green  \red 

Diodes = 1N4148

NOTE Diode protocol: Kathode---|<diode---Anode

NEC 11A transciever

**NOTE-A car kit power loom is required to power phone, also a handset 
is required, and is plugged into the female end of the gender change plug.

**NOTE-The gender change plug is a male 15 pin D plug soldered back to back
back with a female 15 pin D socket. Male end interfaces transceiver, female
end interfaces the handset.                      15 Pin D-Gender changer


____________________                       _______________________
 Pin                                        Pin
  1.------green----------------------------- 13. green
  6.-|<1n4148------ 
  8.-|<1n4148--   | 
              |   | 
 10.-----------   | 
 13.------red--------------------------------12. red
 15.------blue-------------------------------14. blue
 18.------black-------------------------------2. black
    \-----black------------------------------11. black
Power supply 12V dc. Power up using handset BEFORE interfacing computer LPT1.
NOTE Diode protocol: Kathode---|<diode---Anode

NEC P3.
_______

25 Pin D-plug LPT1.                         Plug on end of curly cord.
___________________                         __________________________

Pin 25.--------------------black--------------------------------------|
Pin 15.--------------------red-------------------------------------|  |
Pin  6.---|<In4148--|                                              |  |
Pin 13.-------------|------white--------------------------------|  |  |
                                                  ||   [] [] [] [] [] []
                         view into plug:aerial---><>
Pin  3.---|<1N4148---|                            ||   [] [] [] [] [] []
Pin 12.--------------|-----brown--------------------------------|

NOTE Diode protocol: Kathode---|<diode---Anode
  
  NEC P4
  ______

  25 Pin D-plug LPT1.   Transistors 2N3904 npn   NAM Adaptor Plug   
  ___________________   ______________________   __________________

  Pin 15.-----C-\------green----------------------------------------|
                 \                                                  |
  Pin  2.-10K-B---O                                                 |
                 /                                                  |
  Pin 19.-----E-/------blue-----------------------------|           |
  Pin 19.-----E-\                                       |           |
                 \                                      |           |
  Pin  4.-10K-B---O                                     |           |
                 /                                      |           |
  Pin 12.-----C-/---|--yellow                           |           |
                    |                                   |           |
                    |                                   |           |
                    |   NAM Adaptor plug: aerial ---><> [] [] [] [] [] [] [] []
                    |                                            |      |
  Pin 13.----red---(|)-------------------------------------------|      |
                    |                                                   |
                    |---------------------------------------------------|
Panasonic D,E,F 
----------------
  Build the Maplins 'RS232 to TTL conversion board 'MAX232(Order Code LM75S)to  
  specification, except do not include resistor R5. Switches SW-1 must be in the
  OFF position.


 9 PIN SERIAL D-PLUG                                  Interface PL2 on MAX232
Pin 8.----------------|--IN4148>|----\
Pin 7.----------------|               \___________________ 1.Pin
                                      /
Pin 4.----------------|--IN4148>|----/
Pin 6.----------------|
Pin 3.-----------------------------------------------------7.Pin
Pin 2.-----------------------------------------------------6.Pin
Pin 5.-----------------------------------------------------8.Pin
*****************************************************************************
 PL1.on MAX232----------'F'Lead------------'D'Lead-----------'E'Lead
 Pin 2+6                 pin 1.             pin 6.            pin 5.       
 Pin 5                   pin 6.             pin 5.            pin 1.
 Pin 7.                  pin 2.             pin 4.            Link to program
                                                          ___ Pin/Power lead 
 Pin 8.                  pin 8.           aerial brade  /     Pin 8.         
                                                       /       /////          
                        1 3 5 7             2  4  6   /1_______|  |_________12
                        [][][][]            [] [] []  [][][][][][][][][][][][]
   View of Plugs-->   <>                 <>           |______________________|
                        [][][][]            [] [] []       |_________________|
                        2 4 6 8             1  3  5
Diode Protocol: Anode---diode>|--Kadthode