Design factors influencing the economical size and spacing of multi-channel telephone repeaters

A logical basis is advanced for the design of any system in terms of the longest circuit of which it might form a link and for the determination for such a system of the most economical size and spacing of the repeater stations. It is shown that in multi-channel systems it may be economical to space repeaters more closely together and to use amplifiers of lower power than might have been expected from methods of approach to the subject hitherto prevalent.