2-8. FOUR-WIRE CIRCUIT WITH ONE-WAY REVERSIBLE TELETYPEWRITER TRANSMISSION.
This task covers:
4-wire line or TG carrier terminal
Set to NORM.
1. Telegraph terminal
Set to 4W.
Put gray plug into SEND jack.
Gray plug (3)
Put black plug into SEND jack.
Black plug (4)
Put red plug into REC jack.
Red plug (5)
When using 4-wire line, the send pair is usually colored
green and black, the receive pair is usually colored red,
white, or yellow. If TG carrier terminal does not match
above color code, refer to the proper TM for connection