Cable Forum - View Single Post

Kymmy · 26-09-2011, 09:02

By the voltage references you gave it sounds more like B standard (A standard would use pins 1&2 for DC positive), B standard uses separate voltage to data pins for 10/100 and shared data/voltage pins for gigabit. Please don't get confused with crosstalk which is a data line interfering with another data line and nothing to do with superimposing DC voltages on data lines (which simply uses DC blocking to stop the DC voltage from interfering with the data receptors).

Are you using 10/100 or gigabit? If gigabit can you drop it down to 10/100 and try again please.

26-09-2011, 09:02	#7
Kymmy Inactive Join Date: Dec 2007 Posts: 18,385	Re: POE issue By the voltage references you gave it sounds more like B standard (A standard would use pins 1&2 for DC positive), B standard uses separate voltage to data pins for 10/100 and shared data/voltage pins for gigabit. Please don't get confused with crosstalk which is a data line interfering with another data line and nothing to do with superimposing DC voltages on data lines (which simply uses DC blocking to stop the DC voltage from interfering with the data receptors). Are you using 10/100 or gigabit? If gigabit can you drop it down to 10/100 and try again please.