Common channel interoffice signaling system
Patent 4499336 Issued on February 12, 1985. Estimated Expiration Date: 
October 29, 2002. 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.
October 29, 2002. 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 ReferencesAutomatic fault recovery system for a multiple processor telecommunications switching control Apparatus for CCIS data transfer between a CPU and a plurality of data terminal equipment Patent #: 4466062 InventorsApplicationNo. 06/437646 filed on 10/29/1982US Classes:379/230Signalling path distinct from trunk (e.g., CCIS)ExaminersPrimary: Brown, Thomas W.Attorney, Agent or FirmInternational ClassH04Q 3/00 (20060101)AbstractA modular Common Channel Interoffice Signaling (CCIS) system is described for use with an electronic switching office. This system provides for minimal impact to the program instructions of the switching office. Virtually all modifiable CCIS program instructions are contained within the CCIS system. Therefore, any feature changes or additions to the CCIS system affect only the CCIS system and not the switching office. In addition, the central processing arrangement of the present CCIS system operates a large number of analog and/or digital transmission devices for CCIS data transfer.Other References
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