NEC DTU-70 Instruction Manual page 78

TX-D +
TX-D -
from
previous
RX-D +
equipment
RX-D -
GND
TX-D +
/RX-D +
TX-D -
/RX-D -
from
previous
equipment
GND
(Connection for 4-wire)
TX
J3
3
4
6
7
5
INTERFACE BOARD
(Connection for 2-wire)
TX
J3
3
4
6
7
5
INTERFACE BOARD
3 - 30
J4
3
TX-D +
4
TX-D -
6
RX-D +
7
RX-D -
5
GND
J4
TX-D +
3
/RX-D +
TX-D -
4
/RX-D -
5
GND
GWP-G22996
to
next
equipment
to
next
equipment