A "'pair gain system "'consists of concentrators or multiplexers which combine the separate signals into a single signal which is transmitted through the existing copper cable pair.
12.
In a departure from both 10BASE-T and 100BASE-TX, 1000BASE-T and above use all four cable pairs for simultaneous transmission in both directions through the use of echo cancellation.
13.
As the main applications had 18 bits color depth in early adoption of FPD-Link, a 7-bit wide differential cable pair for each of 3 channels with another channel for clock became used.
14.
A T1 span can have up to +-130 Volts of DC power superimposed on the associated four wire cable pairs to line or " Span " power line repeaters, and T1 NIU's ( T1 Smartjacks ).
15.
One cable pair ( of wires ) will " appear " in several different terminal locations ( poles or party lines, 2, 4, 6, or 8 users were commonly connected on the same pair which appeared at several different locations.
16.
In a departure from both 10BASE-T and 100BASE-TX, 1000BASE-T uses four lanes over all four cable pairs for simultaneous transmission in both directions through the use of echo cancellation with adaptive equalization and five-level pulse amplitude modulation ( PAM-5 ).
