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"Telephone, n. An invention of the devil which abrogates some of the advantages of making a disagreeable person keep his distance. "
Ambose Bierce
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| Number | Title | Issue Date |
| 5909464 | Serial communications interface that supports multiple interface standards An interface for connecting data-terminal-equipment (DTE) to a range of data-communication-equipment (DCE) using a multiplicity of interface standards is provided. The interface includes a DTE panel connector and a plurality of line drivers and receivers ... | 06/01/1999 |
| 4731816 | Ensemble modem structure for imperfect transmission media A high-speed modem that transmits and receives digital data on an ensemble of carrier frequencies spanning the usable band of a dial-up telephone line. The modem includes a system for variably allocating data and power amount the carriers to compensate fo... | 03/15/1988 |
| 4679227 | Ensemble modem structure for imperfect transmission media A high-speed modem that transmits and receives digital data on an ensemble of carrier frequencies spanning the usable band of a dial-up telephone line. The modem includes a system for variably allocating data and power among the carriers to compensate for... | 07/07/1987 |
| 4438511 | Packetized ensemble modem A high speed digital data modem particularly suited for use on a dial up telephone line is disclosed. For the transmit ensemble, the telephone passband is divided into sixty-four sub-bands each with a carrier located approximately in the center of each su... | 03/20/1984 |
