专利名称：Multiple protocol personal communications
network system
发明人：Paul Baran申请号：US08/843111申请日：19970424公开号：US05926479A公开日：19990720
摘要：A bi-directional communications system for bypassing a local exchange carriertelephone system for conveying data between at least one terminal unit and a switchingunit that has the functionality of a Class 5 central telephone office switch that isconnected to a public switched telephone network. The system includes a relaytransceiver where the signals from the terminal units are converted bi-directionallybetween the signal format of the terminal units and fixed length compliant ATM cellswhen the signal format of the terminal units is other than a fixed length compliant ATMcell format. In a transmission interface unit there is a bi- directional conversion of thefixed length compliant ATM cells to time division multiplexed signals in the upstreamdirection and from time division multiplexed signals to fixed length compliant ATM cellsin the downstream direction, wherein the upstream signal direction is toward thetransmission interface unit and the downstream signal direction is toward the terminalunits. Further, the system includes the transfer of the time division multiplexed signals tothe switching unit. In another embodiment of the present invention there can be at leasttwo terminal units each designed to transmit and receive in different signal formats fromeach other and a programmable relay transceiver unit.
申请人：COM 21, INC.
代理人：Allston L. Jones
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