Moving Toward IP Using RJ-45 Connected UTP Wiring

A tutorial on how to use RJ-45 UTP cabling for video transmission and camera control as you migrate toward IP-based wiring


How It All Comes Together

To build this system, you'll need to employ video transceivers. The UTP CCTV power-video-data transceiver provides a direct video output connection from the camera. Plus, it adds power and data connections (the PTZ instructions) to and from the camera.

As a result, the interference rejection and low emissions of the RJ45 connector PVD let video signals co-exist in the same wire bundle as telephone, datacom or low-voltage power circuits. This allows the use of a shared or existing cable plant, reducing costs and time of installation.

With this new PVD, power, video and data are routed via UTP and RJ45 or 'press-fit' terminal block inputs/outputs. When used at the camera, the passive PVD has a 9-inch mini-coax pigtail lead for direct video output connection from the camera.

Alongside the coax lead are two sets of "press-fit" terminal blocks for quick pass-through connections for the camera's power and data. On the "house" or output side of the product, installers have the option of deploying convenient "press-fit" UTP connectors or the more efficient RJ45.

With this solution, installers can leverage the positive aspects of a structured cabling network architecture, their first step to an IP system. The RJ45 wiring pin-outs are compatible with the datacom and telecom industry standard EIA/TIA-568B, so termination mistakes are minimized and testing is standardized. Using the advantages of a structured cabling system and star-wired layout, power supplies can be centrally located.

How It Works

Power, video and data are converted at the camera by the transceiver, which uses a single 4-pair cable with RJ45 connectors to deliver each camera's signals to a "Cable Integrator" at the wiring or IDF closet. The cable integrator receives low-voltage camera power from any third-party Class 2 power supply and delivers it to the camera cables. Control room connections are achieved with 4-pair RJ45 cable(s) into a passive or active receiver hub. For single runs within the distance requirements, a second PVD may be employed at the receive end without the need for a Cable Integrator.

The schematics (above, right) further details the PVD system. Note that a backbone layout is used between the equipment closet containing the cable integrator and receive end control equipment.

Converting to an IP Solution

This is where the system really shines. Once the company is ready to go to a fully IP system, you simply disconnect the UTP connections. That's all there is to do...a win-for-today system becomes a win-for-tomorrow solution.

About the author: Guy Apple is vice president of Network Video Technologies (NVT) and a strong proponent of RJ45-based UTP connections. NVT offers a variety of video transceivers and hub systems for video transmissions. The company can be found online at www.nvt.com