Wiring colours and functions used in the two black cables that
connect the "Plessey/Skanti TRP 8255 S R" to the outside world


Serial control cable.  		(Command and control)

SK1 "Control"	PC (D9F)	CU [601] TS1
				RS232: 2400,O,8,1

Red		3		1 = Serial Input:	Red.

Shield		Shell		2 = Frame Ground:	Pink.

Yellow		2		3 = Serial Output:	Yellow.

Blue		5		4 = Serial Ground:	Blue.

Green				Not used.
White				Not used.
Black  				Not used.



TX/RX Data (Audio) cable.  	(TX/RX AF in/out)

PL1 "Data"			CU Line Xfmr board [603]
				Audio: aprox 0dBm, Z = 600 Ohm.

Yellow				1 = RX Line Out -	White.

Shield (NOT frame)		2 = RX Line Out Gnd 	Pink.

Green				3 = RX Line Out + 	Green.

Red				7 = TX Telex In -	Red.

Blue				9 = TX Telex In +	Black.

White				Not Used.
Black				Not Used.