NEC DTU-70 Instruction Manual page 77

3) RS-485
Table 3-13 REMOTE CONTROL (J3) on INTERFACE BOARD
Pin No.
1
2
3
4
5
6
7
8
9
Table 3-14 REMOTE CONTROL (J4) on INTERFACE BOARD for daisy chain
Pin No.
1
2
3
4
5
6
7
8
9
Signal
Transmit Data + (TXD +)
Transmit Data - (TXD -)
Ground
Receive Data + (RXD +)
Receive Data - (RXD -)
Signal
Transmit Data + (TXD +)
Transmit Data - (TXD -)
Ground
Receive Data + (RXD +)
Receive Data - (RXD -)
3 - 29
GWP-G22996