TransPort WR21 hardware
Digi TransPort User Guide
32
TransPort WR21 serial pinout
RS-232 pinout
WWAN
SECONDARY
SERIAL 0
9-30VDC
2A MAX
WWAN
PRIMARY
LAN 1
LAN 0
SERIAL 0
Pin 1
Pin 9
Pin #
Direction
RS232 DCE
Description
1
Out
DCD
Data Carrier Detect
2
Out
RXD
Receive Data
3
In
TXD
Transmit Data
4
In
DTR
Data Terminal Ready
5
N/A
GND
Ground
6
Out
DSR
Data Set Ready
7
In
RTS
Ready To Send
8
Out
CTS
Clear To Send
9
Out
RI
Ring Indicate