Telephone switching circuit

Details Telephone switching circuit Telephone switching circuit

1976-10-27

1978-11-14

Stewart, David L.

179 15AQ, H04Q 1104

Patent

active

041257472

ABSTRACT:
The present invention relates to telephony switching circuits which are used in electronic automatic exchanges operating on the time-division multiplex system known as PCM. According to the invention, a spatial and time switching circuit comprises a plurality of registers for memorizing the binary words of an input PCM frame, a plurality of time-slot registers for memorizing the output time-slots of the binary words, means for reading out the binary words registers when the time-slots defined by the time-slot registers occur, means for spatially switching the binary words thus readed out onto a plurality of output PCM links, and means for filling the output time-slots into the time-slot registers and selecting the output PCM links.

REFERENCES:
patent: 3458659 (1969-07-01), Sternung
patent: 3761894 (1973-09-01), Pilc
patent: 3790715 (1974-02-01), Inose
patent: 3924079 (1975-12-01), Garrett
patent: 3959594 (1976-05-01), Srivastava

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