Legrand SPDU20-0U Quick Start - Manual (Page 3)

1 DCD
2 TxD
3 RxD
4 DSR
5 GND
6 DTR
7 CTS
8 RTS
9 ---
1 DSR
2 RTS
3 GND
4 TxD
5 RxD
6 DCD
7 CTS
8 DTR
RS-232 - RJ45 (8-pin)
C-RJ45-DB9F-4, RJ-45 to RS232 (Female, DCE) cable, 4'.
RS232 DB9 Female RJ45 (8-pin)
Pin # Signal Pin # Signal
1 DCD
2 RxD
3 TxD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 ---
1 DSR
2 RTS
3 GND
4 TxD
5 RxD
6 DCD
7 CTS
8 DTR
RS-232 - RJ45 (8-pin)
C-RJ45-DB9M-4, RJ-45 to RS232 (Male, DTE) cable, 4'.
RS232 DB9 Male RJ45 (8-pin)
Pin # Signal Pin # Signal
Local Master Port Signals supported:
RXD/TXD, CTS/RTS, DTR, DSR.
User Serial Port Signal Supported:
RXD/TXD, CTS/RTS.
Typical Connections:
1. PC (DTE, Male) fg Local Master Port (DCE, Female)
2. Local Master Port (DTE, Male) fg External Modem
(DCE, Female)
Note: The system sends external Modem Command string in
every a few minutes. The manufacture pre-set default
Modem command string configures the external Modem
with proper signal handshaking and call-answer mode.
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