OFFICE AUTOMATIC PHONE EXCHANGE STATION WITH TEMPORAL-PULSE CHANNEL SHARING

摘要

FIELD: telephone devices. SUBSTANCE: pulse-duration modulator 4 for group digital voice signal, pulse-duration demodulators 33(1)-33(n) for corresponding individual channels, access units which has different type line sets 32(1)-32(n) are introduced to accomplish goal of invention. EFFECT: unit design of line sets, pulse-duration modulation, increased functional capabilities, increased flexibility in use, increased stability to noise. 1 dwg