differential line การใช้

V cc on both differential lines.
Here, \ vec { S } is the surface enclosed by the curve C with differential line element d \ vec { l }.
This signalling strategy differs significantly from other balanced line transmission technologies such as RS-422 / 3, RS-485, etc . which employ differential line drivers / receivers and use a signalling system based on the differential mode voltage of the balanced line crossing a notional 0 V . Multiple access on such systems normally relies on the media supporting three states ( active high, active low and inactive tri-state ) and is dealt with in the time domain.