Memory network for TDM switching system

Details Memory network for TDM switching system Memory network for TDM switching system

1978-12-04

1981-01-20

Stewart, David L.

Multiplex communications

Wide area network

Packet switching

370 68, H04Q 1104

Patent

active

042465303

ABSTRACT:
A memory network for a time division system. In memory for each time slot are stored the addresses of the telephone lines using that time slot. A call is processed by transferring addresses and control between time slots associated with various call functions such as registering dial pulses (register), supervising local calls (link) or supervising trunk calls (trunk). The addresses are sequentially brought from memory in the respective intervals representing the time slots in which the addresses are stored and retained in those time slots or transferred. For each time slot in which an address transfer occurs, a record of a transfer having been made is retained temporarily for that time slot. Reference is made to that record before a new address is stored in memory to prevent inadvertant errors causing address changes in memory.

REFERENCES:
patent: 3941936 (1976-03-01), Graham
patent: 3967070 (1976-06-01), Srivastava
patent: 3987251 (1976-10-01), Texier
patent: 4160876 (1979-07-01), Bojanek

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