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Your search returned 44 patents.
( 379/333 in Current US Classification ) |
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| Patent ID | Title | Date Filed |
| 6031906 | Digital loop carrier system with automatic reprovisioning of dedicated lines
| September 29, 1997 |
| 5995618 | Method for redirecting traffic on a communications network for conservation of network resources
| July 8, 1996 |
| 5764754 | Subscriber loop reconnection device and method
| December 22, 1994 |
| 5568545 | Centralized command system for a telecommunications network
| April 12, 1995 |
| 5533114 | Telecommunication system comprising subscriber connection units having independent routing ability
| February 24, 1994 |
| 5457741 | Subscriber transmission system
| January 31, 1994 |
| 5455824 | Message information terminating system
| October 5, 1993 |
| 5347566 | Retrofit subscriber loop carrier system with improved performance monitoring and remote provisioning
| October 23, 1991 |
| 4924457 | Concentrator system with polling-response means for detecting failures to stop tariff charges on locally established intraoffice calls
| March 13, 1989 |
| 4837810 | Telephone switch center with control of individual devices
| March 9, 1988 |
| 4754480 | Circuit arrangement for telecommunication switching systems connected to line concentrator sub-exchanges by connecting channels
| February 25, 1986 |
| 4689783 | Digital satellite exchange
| August 6, 1984 |
| 4622438 | Subscriber line radio concentration system with automatic response for a loop back test
| November 26, 1984 |
| 4571721 | Composite concentration system
| September 16, 1982 |
| 4535203 | Bridge rectifier circuit
| December 7, 1983 |
| 4533914 | Remotely controlled crossconnection system
| November 8, 1982 |
| 4472801 | Distributed prioritized concentrator
| March 28, 1983 |
| 4451703 | All electronic interface for telephony system
| December 30, 1981 |
| 4437096 | Concentrator circuit incorporating solid state bilateral bridge arrangement
| December 30, 1981 |
| 4112260 | AC type line concentrator
| February 1, 1977 |
| 4007339 | Arrangement serving operator assistance calls requiring routing back to originating offices
| November 28, 1975 |
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