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5-4 Smartio C168H/HS User’s Manual
PC COM2 port, Serial Printer,
Terminal, or any DTE Device
Opt8D
Opt8D DTE Device
DB9 Male DB25 Male
RxD 2 2 TxD
TxD 3 3 RxD
CTS 8 4 RTS
RTS 7 5 CTS
DTR 4 6 DSR
DSR 6 20 DTR
GND 5 7 GND
DCD 1 8 DCD
Type 2: To connect Smartio C168 Series to a DCE device.
Modem,
or any DCE Device
Opt8A/S
Null Modem Cable
Opt8A/S DCE Device
DB25 Female DB25 Female
RxD 2 2 RxD
TxD 3 3 TxD
CTS 4 4 CTS
RTS 5 5 RTS
DTR 6 6 DTR
DSR 20 20 DSR
GND 7 7 GND
DCD 8 8 DCD