Coax Over Ethernet

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Lazy Panda

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Jul 22, 2013
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I need a single coax to ethernet box that has a coax in, ethernet out, and coax out port. I have been able to find a model with a single coax and ethernet but not a model with 2 coax ports. Is this possible or will I need to do something more complex?

I basically need to run a signal over coax from the home office to the basement for internet to the basement, then continue the coax into another room in the house. All the coax is in place I just need that box
 
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Do you mean a DOCSIS cable modem? or something like this?

http://www.axis.com/products/cam_acc/media_converters/cam_t8640/

They don't have a coaxial output because the input can simply be split if necessary.

If the coaxial cable is old, it may be of the cheap RG-59 specification. If it is, it may be no good for digital transmission and should be replaced with the more expensive RG-6 variety which is suitable for high bitrate digital transmission.
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Pinhedd

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Aug 7, 2007
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Do you mean a DOCSIS cable modem? or something like this?

http://www.axis.com/products/cam_acc/media_converters/cam_t8640/

They don't have a coaxial output because the input can simply be split if necessary.

If the coaxial cable is old, it may be of the cheap RG-59 specification. If it is, it may be no good for digital transmission and should be replaced with the more expensive RG-6 variety which is suitable for high bitrate digital transmission.
 
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Lazy Panda

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Jul 22, 2013
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Ok so the issue is that I need ethernet running to my room, but cant run a cable from my room to the modem itself. The easiest solution seems to be running ethernet over coax because coax cables run through the house but all of them go through the basement. So we run the coax line of the modem to the basement and then up to my room and convert it back to ethernet. The issue is direcTV also needs coax running to our tv and ethernet. Its currently using the coax in the room with the modem, so we need to move it for me to get ethernet. I need a box that can convert the coax to ethernet for the directv while keeping the coax signal going to my room. Is this possible with a splitter? I didn't think you could split the coax signal
 
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Pinhedd

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Coaxial can be split, but you must be careful when you split it. Each time it is split into two it loses half it's signal power (-3dB) which limits the number of times that it can be split without introducing an expensive repeater.
 
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Lazy Panda

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Jul 22, 2013
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I only plan to split it once. If I split it though how far could the signal travel without losing strength?
 
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Pinhedd

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The attenuation depends on the frequency of the signal component, but it shouldn't be significant for the <100 ft span.
 
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wacabletech

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Dec 15, 2012
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What you want is called a moca device, Multimedia over coax alliance, and they exist but you can just run cat5 cheaper, last I saw somewhere around 200 for the pair to go from Ethernet to coax, and back. :(

maybe they have come down in price though.
 
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