User Manual
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The pinouts for both the MDI (NIC-type) and MDI-X (HUB/switch-type) 
ports as shown below: 
MDI Port Pinouts 
MDI-X Port Pinouts 
8-pin RJ45 
Pin 
Signal 
1 
Tx+ 
2 
Tx- 
3 
Rx+ 
6 
Rx- 
Pin 
Signal 
1 
Rx+ 
2 
Rx- 
3 
Tx+ 
6 
Tx- 
RS-232/422/485 Serial Port 
The AWK-1137C has 1 RS-232/422/485 serial port with DB9 connector 
for serial-to-WLAN connectivity. The pin assignments for the serial 
ports are shown below: 
Pin  RS-232 
RS-422/485 
(4W) 
RS-485 
(2W) 
1 
DCD 
TxD-(A) 
– 
2 
RxD 
TxD+(B) 
– 
3 
TxD 
RxD+(B) 
Data+(B) 
4 
DTR 
RxD-(A) 
Data-(A) 
5 
GND 
GND 
GND 
6 
DSR 
– 
– 
7 
RTS 
– 
– 
8 
CTS 
– 
– 
9 
– 
– 
– 
LED Indicators 
The front and side panel of the Moxa AWK-1137C contains several LED 
indicators. The function of each LED is described in the table below: 
LED 
Color 
State 
Description 
SYS 
Green 
On 
System start up complete and the 
system is in operation 
Blinking + 
Beeps 
(Interval: 1 
second) 
Device has been located by the 
Wireless Search Utility 
Red 
On 
System is booting or a system 
booting error has occurred 
Blinking 
(Interval: 0.5 
second) 
IP address conflict 
Blinking 
(Interval: 1 
second) 
Cannot obtain an IP address from the 
DHCP server 
WLAN 
Green 
On   
(RSSI > 35) 
WLAN interface has connected 
Blinking 
Data communication via WLAN 
Amber 
On   
(RSSI < 35) 
WLAN interface has connected 
Blinking 
Data communication via WLAN 










