SOUTHERN BELL TELEPHONE AND TELEGRAPH CO ATLANTA GA
Southern Bells use of buried PIC cable and underground wire for rural distribution plant is discussed. Analyses indicate that inplant cost of buried PIC cable is from 15 to 30 less than that of equivalent aerial plant, exclusive of pole line costs. Moreover, plowing was found feasible in much more difficult terrain than was originally thought possible, and the trouble incidence is very low.
Annual Wire and Cable Symposium (6th), Asbury Park, New Jersey, December, 1957.