U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Delta network of a cross-point switch

Patent 4752777 Issued on June 21, 1988. Estimated Expiration Date: Icon_subject May 12, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Selection switch memory circuit
Patent #: 4074233
Issued on: 02/14/1978
Inventor: Swain

Time division multiplex communication device comprising a switching matrix between C/E buffers and control circuits
Patent #: 4147894
Issued on: 04/03/1979
Inventor: Watanabe ,   et al.

Transfer bus matrix
Patent #: 4393381
Issued on: 07/12/1983
Inventor: Seiden

Remote control signal transmitter capable of setting custom codes individually alloted to a plurality of controlled instruments
Patent #: 4412218
Issued on: 10/25/1983
Inventor: Niitsu

Speed independent selector switch employing M-out-of-N codes
Patent #: 4518960
Issued on: 05/21/1985
Inventor: Clark

Data entry keyboard apparatus Patent #: 4570154
Issued on: 02/11/1986
Inventor: Kinghorn ,   et al.

Inventor

Application

No. 07/048982 filed on 05/12/1987

US Classes:

340/2.24Having master control element

Examiners

Primary: Weldon, Ulysses

Attorney, Agent or Firm

International Classes

H04Q 3/64 (20060101)
H04Q 3/68 (20060101)

Abstract

A switching system comprising a cross-point switch and a Delta network. The two switches are connected in parallel with common port adaptors. When a port desires a specified time reservation to another port, it sends a request message for the specified time over the Delta network to the requested adaptor at which a reservation processor grants a connection for completion at a fixed time in the future. The reservation grant is then returned via the Delta network to the requesting adaptor which, at the fixed time, sets the cross-point connection on the cross-point switch line associated with the requesting adaptor.

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