CONNECTIONS
Purpose	Location	Purpose	Location
RS-232/422	CN1	Ground	GND
Receive positive	+RCV	Transmit positive	+XMT
Receive negative	-RCV	Transmit negative	-XMT

CD SIGNAL
Setting	JP1
» Forced high	Pins 2 & 3 closed
Normal	Pins 1 & 2 closed

ECHO
Setting	JP3
» On	Pins 1 & 2 closed
Off	Pins 2 & 3 closed

IMPEDANCE
Setting	JP4
» Low	Pins 1 & 2 closed
High	Pins 2 & 3 closed

LINE CONNECTION
Setting	JP2
» 4-wire	Pins 2 & 3 closed
2-wire	Pins 1 & 2 closed