NEC P-200 & probably P-300 data jack pinouts
information collected by Doctor Who, 1/26/95

Here's what the connector looks like:

        1    6
        ......
      O ......
        7    1
             2

Where I have the "O" above is a coaxial connector for RF out. The numbers 
represent the pins.

1    RCV AF
2    SPKR
3    RFC/HFC
4    S-Data
5    SPARE
6    External DC
7    External 12V
8    XMIT AF
9    A GND
10   BUSY NOT
11   SYNC NOT
12   GND

-----------=?> DOCTOR WHO <?=-----------

-END