Hardware Configuration
ROBO-8771VG2 User’s Manual
2-7
J18: External Wake On Ring Connector 0
PIN No.
Signal Description
1 5VSB
2 Ground
3
External WOL Signal Input (Active low)
J19: External Wake On Ring Connector 1
PIN No.
Signal Description
1
Ring Signal Input (Active low)
2 Ground
J20: COM1 Serial Port 1 Connector
PIN No.
Signal Description
RS-232 RS-422
RS-485
1
DCD (Data Carrier Detect)
TX-
DATA-
2
RXD (Receive Data)
TX+
DATA+
3
TXD (Transmit Data)
RX+
N/C
4
DTR (Data Terminal Ready)
RX-
N/C
5 GND
(Ground)
GND
GND
6
DSR (Data Set Ready)
N/C
N/C
7
RTS (Request to Send)
N/C
N/C
8
CTS (Clear to Send)
N/C
N/C
9
RI (Ring Indicator)
N/C
N/C
10 N/C
N/C
N/C
Note:
J21 (COM1) could be configurable as RS-232/422/485 with jumper JP1
J21 : COM2 Serial Port 2 Connector
PIN No.
Signal Description
RS-232
1
DCD (Data Carrier Detect)
2
RXD (Receive Data)
3 TXD
(Transmit
Data)
4
DTR (Data Terminal Ready)
5 GND
(Ground)
6
DSR (Data Set Ready)
7
RTS (Request to Send)
