User guide

A
RF45
User Guide
Ref. 09-08-V0-smn p 6
Serial link wiring
The WIFI modem serial interface wiring is a two-step connection process:
First connect the modem to a PC to set up the modem configuration,
Then connect the modem to the final equipment for data transmission.
Connection during serial configuration phase
For the initial configuration phase, the WIFI modem has to be connected on
to a PC COM port. The set-up configuration software does not require
RTS/CTS wiring. The following scheme is an example of connection with a
PC:
+ DC Supply
PWR
WLAN
ACT
- CTS + RTS RX TX
5 2 3
SUB-D 9
PC
(DTE)
Modem
(DCE)
Connection for data transmission
For the data transmission phase, the WIFI modem is attached by its serial
port to the final transmission equipment. If the hardware flow control has
been selected during modem configuration phase, RTS and CTS lines have to
be connected between both pieces of equipment.
The following scheme is an example where the modem is connected as a
piece of DCE equipment to a DTE with hardware flow control handshake: