Improvements in 12-channel transmission system by airline and cable. (Machine-translation by Google Translate, not legally binding)

摘要

Device for transmission of 12 channels by aerial line and by cable.consta of a cylinder of transfer of channels (1), a circuit of transfer of group or repeater terminal (2), a circuit of line (4), a circuit of feeding (5), a frequency generator (6), a circuit of alarms (7) and another of telealarms (8), as well as block circuits (9) and of orders (10). (Machine-translation by Google Translate, not legally binding)