In communications, a feeder line
is a peripheral route or branch from a main line or trunk line
A feeder line is either a coax cable
line or an open feeder line
(more commonly used in lower frequency broadcasting in place of coax).
While applicable to any area of communication
making using of a hierarchical
network, the term is particularly used in US air travel
and rail transport
Efficient, high-capacity routes connect important nodes while feeder lines connect these nodes to departure and destination points.