ASROCK IMB-140D User Manual page 22

RJ-45 COM Port C (RS232 Only)
(8-pin COM Port C)
(see p.10 No. 11)
LAN
LAN_P8 LAN_P1
22
1: DCD#
2: RXD
3: TXD
4: DTR#
5: GND
6: DSR#
7: RTS#
8: CTS#