Switching network control arrangement
Patent 4229624 Issued on October 21, 1980. Estimated Expiration Date: 
December 21, 1998. 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.
December 21, 1998. 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 3296371 3482057 InventorsAssigneeApplicationNo. 05/972073 filed on 12/21/1978US Classes:340/2.28, Crosspoint switch detail (i.e., specific crosspoint)379/272Path selection or routingExaminersPrimary: Brown, Thomas W.Attorney, Agent or FirmInternational ClassesH04Q 3/68 (20060101)H04M 3/50 (20060101) H04Q 3/64 (20060101) AbstractAn arrangement tears down existing connection paths in a two stage switching network wherein switching paths are set up progressively by control circuits in both switching stages. A first-stage setup command is received by a first-stage control circuit and the second-stage control circuit of the previously established connection path. The first-stage control circuit responds to the first-stage setup command to set up a connection path through the first-stage switch and the second-stage control circuit responds to the first-stage setup command to tear down the previously established connection path. | |
