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Wireless Communications

Within the last decade, modern wireless communications have rapidly gained popularity among those who design and maintain today's complex traffic-management systems…for good reason. Wireless communications offer many advantages over traditional hard-wire connections in Intelligent Transportation Systems. 

Today's traffic engineers and maintenance personnel have two fundamental choices for sending and receiving signals between sensors, signs, signals and controllers in traffic-control and monitoring systems: 1) underground cables (either copper/FSK or fiber), or 2) wireless (radio).

For reasons given above, there are compelling arguments for choosing wireless communications in new systems, in temporary maintenance or repair situations, system expansion and in system modernization.

These include:

  • Significantly lower installation costs
  • Accelerated installation schedules
  • Reduced maintenance costs
  • Greater system flexibility
  • Enhanced system reliability
  • Immediate access to locations unreachable with fiber or other cabling


The Basic Technology
All ENCOM wireless products use modern frequency-hopping spread-spectrum (FHSS) technology, transmitting in the license-free (ISM) 900MHz band of (for specific applications, 2.4 GHz FHSS can also be provided). The combination of a long-ranging frequency and FHSS minimizes interference from common RF sources, ensuring high data reliability and coverage of long distances. In addition, the FHSS radio modems function as repeaters, thus enabling even longer ranges and complex network setups.

Putting It Together
Compatibility with various system components is a vital consideration in wireless-communications systems. ENCOM offers a wide choice of products to meet a variety of system requirements. These include serial wireless, contact-closure wireless, FSK interfaces and drivers for virtually any type of controller. We also offer plug-in modem cards for the most popular controllers and, last but not least, for common detection racks.

Easy connection is another important consideration. ENCOM offers more than 140 separate data cables, ensuring immediate connection to most system components. These detailed configuration and interface considerations demonstrate our commitment to providing products that fit our customers' applications rather than asking customers to make their applications fit our products.

Typical Applications
Wireless communications span a broad range of traffic-control and monitoring configurations in ITS applications, from intersection interconnect to detection, preemption and wireless variable message signs. ENCOM and RAI engineers are always happy to assist you in finding appropriate wireless solutions to your ITS applications.

Risk-Free Configuration
Numerous practical considerations come into play when designing and implementing any wireless system. ENCOM is the leader in the industry in providing technical support, evaluation tools and configuration software. Critical issues such as RF signal path, signal strength, transmitting distance, etc. are easily resolved with our Site-Survey Kit, ensuring appropriate system design and product selection prior to purchase. Moreover, ENCOM provides the industry's most user-friendly configuration and diagnostics software for quick, easy system installation.

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