Telecommunication system using TDM switching

Details Telecommunication system using TDM switching Telecommunication system using TDM switching

1974-10-04

1976-03-02

Blakeslee, Ralph D.

179 18J, 179 18EB, H04J 300

Patent

active

039419363

ABSTRACT:
A telecommunications system using TDM principles for signalling and speech path usage plus PAM principles for speech transmission. Each function circuit such as a trunk, link or register, etc. is allocated a basic time slot or channel for initiation of its function when indicated. The active period of each function circuit is continued during the period of three succeeding time slots. In this way, up to four function circuits or channel units may be active during a finite period of time.
In the system, a line is scanned at the end of each complete scan of all channels, thereby lessening the complexity of associating a line and a function circuit. The system shown uses the dual highway principle for its speech path and provision is made in each line circuit for switching onto both highways.

REFERENCES:
patent: 3524946 (1970-08-01), Pinet
patent: 3673340 (1972-06-01), Casella
patent: 3676855 (1972-07-01), Tallegas
patent: 3710029 (1973-01-01), Grossman
patent: 3787633 (1974-01-01), Busch
patent: 3819865 (1974-06-01), Weber
patent: 3838226 (1974-09-01), Warman

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