Long distance telephone switching system with enhanced subscriber services
June 22, 2010. 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 3691301 Personal verification system Special services add-on for dial pulse activated telephone switching office Internodal conference call administrator Method for dispensing information Electronic audio communications system with automatic user access features Method for customer definable telephone capability Meet-me conference with control capabilities Electronic audio communications system with versatile user accessibility Communication system with operation-procedure guiding function by speech InventorsAssigneeApplicationNo. 513956 filed on 04/23/1990US Classes:379/88.24, By generated tone379/88.25, Message storage in centralized location (e.g., central office, PBX, etc.)379/196, At switching center379/202.01, Conferencing379/207.11, Service access code379/207.13Party identification or validation (e.g., personal identification number (PIN))ExaminersPrimary: Brown, Thomas W.Attorney, Agent or FirmForeign Patent References
International ClassesH04M 001/50H04M 001/66 H04M 003/50 H04M 011/08 AbstractA long distance telephone switching system is adapted to provide various enhanced subscriber services, such as an audio news and information service, conference calling, voice messaging, message storage and forwarding, and speed dialing, in addition to conventional long distance calling. Additional improvements include the use of prerecorded opening and closing scripts to facilitate the handling of operator-assisted calls, the retrieval of stored subscriber billing data prior to each call reorigination in order to detect instances of possible abuse, and the concatenation of subscriber-input authorization codes with access number data to allow the use of shorter authorization codes by the subscribers. | |
