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| Number | Title | Issue Date |
| 4729126 | Method and apparatus for supervising the accessing and testing of communication systems An apparatus for accessing and testing communication systems and for controlling said accessing and testing. A microprocessor operates under software control to perform various supervisory and computational functions. Communications components permit the ... | 03/01/1988 |
| 4723271 | Apparatus for selectively alerting party line subscribers An apparatus is described having the capability to selectively alert subscribers in a telephone party line system where different subscriber parties are alerted using different ringing configurations. Subscribers are identified as being a member of a part... | 02/02/1988 |
| 4677665 | Method and apparatus for electronically detecting speech and tone A method and apparatus for detecting the presence of speech telecommunications tones on a communication line includes a voltage divider for ranging signals received from a communication line, a C-weight filter which receives the ranged signals and simulat... | 06/30/1987 |
| 4629836 | Method and apparatus for accessing communication systems An apparatus and method for accessing communication systems includes a microprocessor for controlling said accessing. Communication line access is accomplished by an interface with test trunk equipment and MDF shoes. Capability for generating dial pulse, ... | 12/16/1986 |
| 4611101 | Method and apparatus for testing communication systems A microcomputer controlled apparatus and method for testing communication lines including circuits serving multiple functions in the measurements of line electrical and noise characteristics. A current divider, an analog to digital converter, a constant c... | 09/09/1986 |
| 4574167 | Method and apparatus for configurable line testing A method and apparatus are provided for eliminating the need to access those telephone lines that do not have to be tested while still using the sequential line accessing capabilities of the central office switching equipment. As a result dial access time... | 03/04/1986 |
