Using hdmi cable for ethernet?

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dennis34567890

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Sep 27, 2017
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Hi, while my roof was being redone, I had both a 75 foot hdmi cable and a 75 foot ethernet run laid down. The hdmi was working. However, when they finished installing the roof, both the hdmi and ethernet cables became damaged. A signal tester suggests that only a couple of strands in the network cable are shorted, and presumably there are also good strands left in the hdmi cable. Redoing the cables with the roof now on is not feasible. I have confirmed that I can run hdmi over ethernet if the ethernet cable is in working order. I don't know what the differences are between ethernet and hdmi, but my internet search suggests they are both twisted pairs. I don't know if that means the strands in a hdmi cable can be like the strands in an ethernet cable. It seems like they are both wires, but I don't know if a certain resistance is required. My question is: would it be possible to use working strands from both the ethernet and hdmi cable to create a "good" cable that can serve as an ethernet cable? Or use remaining good strands from the hdmi cable alone to create an ethernet cable? Thanks.
 
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A

A truck is a car, and Porsche is a car, too. But designed for very different jobs, and not interchangeable.

Ethernet cable consist of several "twisted pairs". These pairs are carefully designed for maximum performance, and are twisted so that they are "immune" against interferences. For example, each pair is twisted differently.

If you can isolate two twisted pairs inside the HDMI cable...
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USAFRet

USAFRet

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Mar 16, 2013
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It seems both cables are 'broken'.
You can't just merge strands from each to get a working cable.

Time to restring some cable.
Or, since the roofers screwed it up, make them pay for the replacement wiring.
 
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Alabalcho

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Jan 13, 2011
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A truck is a car, and Porsche is a car, too. But designed for very different jobs, and not interchangeable.

Ethernet cable consist of several "twisted pairs". These pairs are carefully designed for maximum performance, and are twisted so that they are "immune" against interferences. For example, each pair is twisted differently.

If you can isolate two twisted pairs inside the HDMI cable, you can try crimping them onto RJ45 connector, and see whether you can run anything over them.
 
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dennis34567890

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Sep 27, 2017
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510
Should have posted this a long time ago, but patching a strand from the HDMI cable into the ethernet cable DID WORK! The strand was much thinner, but I guess interference is not an issue as it was a separate cable, and the network boxes at either end cleaned up whatever inconsistencies there are in the signal. And to the other posters, there are cases where redoing a roof is not a good option as redoing is unlikely to be as clean as the initial layout, and running the cable another way won't be as hidden.
 
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