IBASE IB903 - Manual (Page 26)

INSTALLATIONS
22 IB903F User’s Manual
J21: COM2/RS232 Serial Port
Signal Name Pin # Pin # Signal Name
DCD, Data carrier detect 1 2 RXD, Receive data
TXD, Transmit data 3 4 Data terminal ready
GND, ground 5 6 DSR, Data set ready
RTS, Request to send 7 8 CTS, Clear to send
RI, Ring indicator 9 10 Not Used
10 2
9 1