Show j s jt rw- rw n Ir 49 i- i I J i f y J w k J vi v- v Y I i 1 I 1 ll JO Chrle Chrie NIelson o of or f Bell Telephone Laboratories focuses on the future with a 2 inch pipe no A buried pipe about the size of a persons person's wrist will wUl someday someday some some- someday day carry a quarter of ofa a million telephone conversations simultaneously simultaneously simultaneously simul simul- with enough capacity capacity capa capa- capacity city to transmit letter by letter a full volume 24 set of encyclopedias In tenth one-tenth of a second The hollow lined copper-lined steel pipe known as er than a telescope that will someday carry a quarter of a million telephone conversations Dont Don't judge capacity by size I is part of an economical new communications system being developed by scientists at Bell Telephone Laboratories to meet expected growth In long distance calling data communications and service during during during dur dur- ing the next decade It Is expected that commercial commercial commer commer- cial service using the new tern tem will be Initiated In the late by ATTs Long Lines Dept burled buried about four feet underground will guide high frequency radio waves waves called millimeter waves carrying voice data television and signals A technique called pulse code modulation will convert all types of signals Into similar streams of easily transmitted pulses |