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Propagation
Propagation delay is the time it takes a signal to travel from the input of a
system component to the output; it is usually measured in nanoseconds.
IEEE 802.3 has specific propagation delay maximums for the Ethernet
components. Cable length plays a major role; i.e., a 50 meters (164 ft.) AUI
cable has a maximum propagation delay of 257 ns. The propagation delay
of cable depends on the length and velocity factor of the cable type.
Round-trip propagation delay throughout the entire cable system, from
farthest ends, may not exceed 51.7
µ
s,
±
4
µ
s.
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