Ethernet over Coax

Willamette meets typically run the 100’s and the 200 backwards to have a tailwind. In past years this meant running several hundred feet of network and extension cables for every meet. When Willamette resurfaced the track and football field this summer, part of the project was new conduit throughout the infield.

To help with trouble shooting on meet day I wanted home runs from the track shed (where we do the timing) to each camera location. However, two of the cameras needed a run well over 100m. I had originally asked to use fiber, but for a variety of reason our IT folks did not want to use fiber. The solution they came up with was Ethernet over Coax. The devices, made by NVT, were originally designed for replacing coax security camera with IP cameras without having to run new wires. They can transmit 10/100 BaseT Full Duplex Ethernet up to 305m over 4-pair cat5.

One transceiver in transmit mode can serve and power four transceivers in receive mode. So we have one in the track shed at the start of the run, and one at each camera at the end of the run. Because they are design to operate over two wires we used outdoor CAT6 cable (using only one of the pairs).

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At the camera end I sealed the unit in a project box. There is a 2ft lead that plugs into the camera and on one side and a up-link jack on the other. To help seal the box I used several coats super glue around both the wire lead and the up-link jack. I have Velcro on the back of the box and on the camera pole. On meet day i just plug it into the camera and stick it to the pole.

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With one meet down, it seems to be working well. It will get a real test at our big invite in a couple weeks. If you need to run network to a camera and it’s more than 100m, these transceivers might just be what your looking for.

You can buy them in kits or individually from B&H and Amazon

Ethernet over Coax
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