A local area integrated PCM telephone network

The Pulse Code Modulation (PCM) system is offered as an example of one type of electronic system which will be considered for telephone networks of the future. This system can be developed for use in the controlled switching between subscribers connected to offices by PCM highways. The problems of mutual blocking of time slots on the highways and synchronization of different switching systems can be solved by using speech storage samples. Rearrangement is used to reduce to zero the blocking which occurs in the time division center. A brief description of the apparatus in the system is also included.