Traffic Project:

Many large cities today are faced with additional needs for securing the public safety. Mass transit is an area of concern because of the many hours of operation, day and night. When the challenge was presented to offer solutions for their CCTV requirements that included an infrastructure supportive of future technologies and reaching distances in excess 6000 feet, Nitek provided the cost effective solutions.

The project included CCTV cameras being installed at many different platforms that accommodate trains coming in and out from the City while transmitting the video back to a central location over existing telephone lines that exceed 6000 feet.

Cable used for infrastructure

With the ability to transmit power, video, and PTZ over a single Cat5e cable, it meant that the Mass Transit Authority did not need to purchase or install a coax, 16/2 wire, or a copper pair for PTZ control from each camera, they simply installed a Cat5e cable for all three signals. The Cat5e was installed at each camera and terminated in closet(s) located at each platform. This Cat5e supplied power and PTZ control to each camera while transmitting the video back to the closet. From each closet, through the Nitek equipment, the video was transmitted back to the central Head End, where all the DVR’s were installed, on the existing telephone pairs.

The Nitek Equipment Solution

Since a rack mount solution was requested and in order to meet the requirements for future technologies, Nitek UTPLinks with its flexibility of an assortment of modular cards that can work with analog or megapixel cameras was chosen. In each closet, a PS115 power supply, a CX452 chassis, and the appropriate assortment of five, four port module cards, was used for every 20 cameras. At the camera was either a VB43ATF, passive balun for distances back to the Head End of less than 3000 feet or an active transmitter (TT560 or TT1120) at distances longer than 3000 feet.

With each platform located at different distances from the Head End, the Nitek RK400 rack chassis was chosen for the Head End. The RK400 can accommodate up to 10 module cards at different distances. The TR560x4 card was used for distances less than 6000 feet and the TR1120RR was used for distances over 6000 feet. The combination of transmitters at the camera and these receivers can accept the video from each platform and output a high quality video signal. In addition, with the Nitek solution, the Mass Transit Authority did not have to contend with any ground loop problems.

A Successful Installation