Timeline for Ethernet cabling: UTP, STP, FTP, etc, when is shielding useful/needed?
Current License: CC BY-SA 4.0
15 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| S Feb 27, 2023 at 15:56 | history | bounty ended | jcaron | ||
| S Feb 27, 2023 at 15:56 | history | notice removed | jcaron | ||
| Feb 27, 2023 at 15:56 | vote | accept | jcaron | ||
| Feb 26, 2023 at 12:35 | comment | added | Christian B. | Is there an aspect you feel needs more details or is not covered by the yet given answer? | |
| Feb 20, 2023 at 6:28 | comment | added | Oskar Skog | I think PoE communicates (negotiate ppwer delivery) over the common mode of the pairs? And would therefore be more susceptible. | |
| Feb 19, 2023 at 23:17 | answer | added | Christian B. | timeline score: 4 | |
| Feb 19, 2023 at 15:25 | comment | added | user1850479 | The general advice I've always heard is that for normal use shielded TP is not necessary. I've primarily used it around industrial equipment and especially electric motors. I'm not sure if that still applies looking at 5/10g Ethernet. | |
| S Feb 19, 2023 at 15:09 | history | bounty started | jcaron | ||
| S Feb 19, 2023 at 15:09 | history | notice added | jcaron | Draw attention | |
| Feb 17, 2023 at 13:25 | comment | added | jcaron | @Andyaka I'm more interested in what are the likely sources of interference which the shield would protect against (but the TP wouldn't), and whether those can be expected to be found in "regular" office environments or not. All the information I have found is very subjective, the various shielded versions are "better", but there's really nothing quantitative about what kind of source of interference (and/or parameters, like size, voltage, power...) would require one. | |
| Feb 17, 2023 at 13:17 | comment | added | Andy aka | Twisted pair reduces the M part of EMI i.e. it reduces the induction of noise voltages due to magnetic interference. A shield reduces the E part of EMI i.e. it reduces the injection of currents into the wires due to capacitive coupling. Does that help? Is that the answer you are looking for? | |
| Feb 17, 2023 at 13:06 | comment | added | jcaron | @Andyaka Yes, I understand how twisted pair reduces EM interference, and that's why I fail to understand what exactly the additional shielding protects from, and in what circumstances it's actually useful/needed. If it were never needed I suppose the additional types of cables would not even exist, so there must be cases where it's useful, but I would like to undesrstand what those cases are. | |
| Feb 17, 2023 at 11:59 | comment | added | Andy aka | Do you understand why twisted-pair is needed and that twisted pair also cuts down noise in high EMI environments and reduces cross-talk? | |
| Feb 17, 2023 at 11:45 | history | edited | jcaron | CC BY-SA 4.0 |
added 158 characters in body
|
| Feb 17, 2023 at 11:25 | history | asked | jcaron | CC BY-SA 4.0 |