News MagSafe-like detachable Ethernet cable debuts — Cat6 cables available up to 10 GbE

Notton

Commendable
Dec 29, 2023
903
804
1,260
What a weird design.
It has an arrow to indicate it can't be reversed, yet it lacks a key notch to prevent the user from accidentally flipping the polarity.

So what happens when you accidentally flip the polarity on a PoE network?
 

DerSpatz

Reputable
Nov 17, 2021
1
0
4,510
In a departure from both 10BASE-T and 100BASE-TX, 1000BASE-T and faster use all four cable pairs for simultaneous transmission in both directions through the use of telephone hybrid-like signal handling. For this reason, there are no dedicated transmit and receive pairs. 1000BASE-T and faster require either a straight or one of the crossover variants only for the autonegotiation phase. The physical medium attachment (PMA) sublayer provides identification of each pair and usually continues to work even over cable where the pairs are unusually swapped or crossed.
Source

I did not know that, but that's pretty nice. So these cables should work even when inserted the wrong way around, but only with gigabit ethernet or above, which should cover 99% of all use cases nowadays.