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Alexey Pomogaev2014-06-25 12:44:09
Cables and wires
Alexey Pomogaev, 2014-06-25 12:44:09

Do I need a shielded twisted pair cable for external wiring to PoE equipment?

Laying outdoors, power for the equipment will go through twisted pair (PoE), the maximum distance is 50 m. Does it make sense to buy shielded twisted pair for 1 Gb/s connection? As I understand it, PoE allows you to squeeze out 1 Gb / s on a twisted pair cable?

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4 answer(s)
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Antony Ryabov, 2014-06-25
@tonymadbrain

1. With any external laying, a twisted pair is needed shielded
2. PoE technology does not affect the quality of data transmission. For its implementation, the properties of the Ethernet physical layer are used.

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Cool Admin, 2014-06-25
@ifaustrue

Yes, PoE does not interfere with the 1G laying, only the switch or injectors must support 1G.
en.wikipedia.org/wiki/Power_over_Ethernet
At 50 meters in the absence of interference or a nearby low-voltage (220 \ 380) shielding is not required. But the screen is stronger, because savings can become sideways if the gasket, for example, goes on weight.

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Puma Thailand, 2014-06-25
@opium

in most cases, poe uses free pairs and drives traffic at 100 megabits, so when choosing equipment, you need to look so that it supports gigabit poes on both sides.
a shielded cable is needed if there is external interference, it also increases the reflection inside the cable and thus reduces its maximum possible length.

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Andrew, 2016-05-24
@Xanter

how will you implement the "advantages" of the screen
- you need other plugs
- another patch panel
- drive the ground pin into the ground if you do it -?

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