Inovonics Wireless Corporation 3B63MB4 User Manual

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Connecting the Base Station Directly to Components 
If an interconnect module is not used, connect the components (vehicle detector, speaker/microphone and 
optional monitor speaker) directly to the base station as shown in Figure 5.  Use 18–20 gauge twisted pair audio 
wire for all connections except the microphone.  Use an 18–20 gauge shielded twisted–pair of audio wire for the 
connection to the microphone. 
!
 Important 
The twisted–pair of wires for the microphone connection must be shielded for 
proper operation.  In duplex systems, microphone and speaker cannot be in the 
same jacket unless specially designed for duplex such as 3M 78–8095–0180–8. 
 
Figure 5.  Direct Base Station–to–Component Connections