Line transmission systems

摘要

In a telephone system in which digitally coded speech or data is transmitted in burst mode between a subscriber's set and the local exchange the bursts may be of the same length in either direction or longer in one direction than the other in dependence upon the information to be transmitted. Binary digit values making up the bursts are assembled for transmission in and held following reception of a shift register, and different output points along the register are selected in dependence upon the length of burst to be transmitted.