Multi-Tech Systems RJ-9 Benutzerhandbuch

Chapter 2 – Getting Started 

Multi-Tech Systems, Inc. MultiModem Wireless Modem with Ethernet Interface (S000375B) 

10 

 

Connect a suitable antenna to SMA connector. An antenna is supplied with the bundled package ship kit. If 
you purchase a single unit, you must supply your own antenna. See the User Guide for antenna/RF 
specifications. 

Using an RJ-45 Ethernet cable, connect the 10/100 jack to an internal network switch or hub. 

Plug one end of the power cord into the device and the other end onto a live power outlet. 

•  The PWR LED. 

The

 LED lights after power-up. 

• 

 

 Pressing and holding the 

 

 for 5 seconds will restore all factory default 

settings. 

 

 

 

 
 
 
 
 
 
 
 
 
 
 

This part of the power supply 
cable varies by the region of the 
world to which the product is 
shipped: NAM / EU / GB / IE

 

 

Units shipped with the universal AC power supply are not suited for installation in hazardous 

locations. 

 

• 

Connect the direct-DC power supply cable into the DC 

power source on the vehicle or machine in which you are 
mounting the modem. Be sure the GND connection is 
correct.   

• 

Connect red wire to + (positive) and black wire to – 

(negative).

Note: 

 For automotive application: according to the type of 

application, you can use permanent “+” or key-
switched “+”. Connect the power supply to its source 
(for example, in a mobile situation, to the vehicle’s 
DC fuse/terminal block).  

 Do not connect your wireless modem directly 

to a vehicle’s battery for your power source. Doing so 
may cause power spikes. If you wish to use the battery 
as a power source, add a filtering device to the DC 
input.