Method of and apparatus for switching multi-slot time division s

Details Method of and apparatus for switching multi-slot time division s Method of and apparatus for switching multi-slot time division s

1996-01-18

1997-12-23

Hsu, Alpus H.

Multiplex communications

Pathfinding or routing

Through a circuit switch

370379, 370382, 370514, 370517, H04Q 1104

Patent

active

057012997

ABSTRACT:
To reduce memory space of a speech path memory in a switching circuit for a multi-slot time division signal, only data in effective time slots of an input signal are stored one after another in a speech path memory to be switched into different time slot of an output signal in the present invention. Recording relations between time slot number of the input signal where data to be switched are carried and an address of the speech path memory where the data are stored, a conversion table converts switching control data indicating each time slot number of the input signal of data to be switched into each time slots of the output signal to address data of the speech path memory where the data to be switched are stored, and generates an idle bit pattern inserting signal when the data to be switched are not stored. So, memory space for storing idle channel patterns can be reduced of the speech path memory, enabling economizing total memory space more than a half of memory space needed for conventional switching circuits.

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patent: 5155728 (1992-10-01), Takeuchi et al.
patent: 5467340 (1995-11-01), Umezu
Patent Abstracts of Japan, Abstract of JP-A-3-092027.
Patent Abstracts of Japan, Abstract of JP-A-59-140793.

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