11
Installing the Cellular Gateway Modem
Description, Specifications, Installation, and Program Manual
Federal Signal www.fedsig.com
Connecting the Cellular Gateway Modem
The following section describes the connections on the back of the Cellular Gateway
Modem.
Figure 1 Cellular Gateway Modem Connections
Antenna
Power
Serial Data
(RS232 port)
micro USB
Ethernet
Table 4 Connections on the back of the Modem
Parts
Description
Power Connection
Power is supplied to the modem either through the Power or USB
connection. The Power connection requires a DC power source
between 10 and 60 Vdc. The center pin is + and the outside pin is
ground.
Serial Data (RS232)
Connection
The modem connects to the computer via an RS232 port at the
back of the modem. For the serial port connection, use a standard
9 pin, null modem serial cable.
USB Connection
Use a USB cable with a micro USB connection to connect your
computer and the USB port on the modem.
Ethernet Connection
In situations where antenna cable runs are inconvenient, or
there is an insufficient signal, or additional redundancy is desired,
you can connect the modem to the customer’s network to interface
with the Federal Signal IoT service. (The customer’s network
connects to the FS IoT cloud service via the Internet.)
Antenna Connection
For antenna options, see “Ordering Information” on page 8.
