JETWAY MBD-J-JNF9KC-1047 Technical Manual page 27

(7) *COM1/COM2/COPM3/COM4 (9-pin): Serial Port Headers
*Note: COM1 header is optional for NF9KV Series.
(8) J2 (7-pin): PWRLED Header & Speaker Header
DCD
SIN
SOUT
DTR
GND
Pin 1
SP K+
NC
NC
SPK-
22
Pin 1
6
DSR
RTS
CTS
RI
KEY
2
PWRLE D+
P WRLED-
PWRLE D-
KEY