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| Number | Title | Issue Date |
| 7020628 | Method and system for tracking computer system usage through a remote access security device A system and method for monitoring remote computer access and associated costs is provided. The system includes a remotely located communication server in communication with multiple host computer networks and in communication with a network access server. First and... | 03/28/2006 |
| 6016343 | Call-processing system and method A system and method for processing telephone calls and providing enhanced services is presented. The call processing system includes a network control processor for controlling the processing and routing of the calls and for providing enhanced features, a... | 01/18/2000 |
| 5179550 | System and method for controlling a multi-point matrix switch A system and method for controlling a multi-point matrix switch (13) to route signals in a communication system (11). The invention identifies source and destination ports (129, 133) in the communication system (11) and then polls identified ports (129, 1... | 01/12/1993 |
| 4295007 | Line identifier for switchboards A line identifier at a telecommunication switchboard comprises a matrix of magnetic-induction elements serving as current sensors for detecting a request for establishing a connection between a selected incoming line and a selected outgoing line. The sens... | 10/13/1981 |
| 4252998 | Identifier for manual switchboards with conference facility A line identifier at a telecommunication switchboard comprises a matrix of magnetic-induction elements serving as current sensors for detecting a request for establishing a connection between a selected incoming line and a selected outgoing line. The sens... | 02/24/1981 |
| 3967071 | Switching system of stored program control type A telephone switching system of the stored program control type comprising a calling line identifier for identifying the position of a calling subscriber on the switching network and a called line busy status detector for detecting the free or busy status... | 06/29/1976 |
| 3943298 | Automatic number identification An automatic number identification system in a tributary office having simultaneous dual operation for high traffic capacity. A pair of identifier units applying identification signals via the sleeve wire associated with the calling stations to a common m... | 03/09/1976 |
