Ag Communication Systems Corporation

John Wesley Spenik

Robert E Renner

Greig R Detering

Thomas J Perry

Robert Lawrence Gallick

Randall L Brown

James F Hoff

Frank Sciabica

James B Southway, Jr

Kevin B Plyler

Satrio P Mualim

Scott J Baer

A backplane slot configuration and a bridge card for expanding the expansion slots of one system to include the expansion slots of an adjacent electrically separate system within the same cabinet, and bridging the expansion buses with minimal change of electrical characteristics, particularly impedance, across the bridge. Adjacent end slots are spaced apart according to the relevant specification, and each slot set is configured so that the backplane expansion buses span contiguous slots and the expansion buses include the adjacent end slot.

System for providing bridging of backplane

A system that provides secure transmission of data between a subscriber's PC and an online service provider (OLS) over an Ethernet WAN. The system includes a remote transceiver unit located at a subscriber site and connected to the subscriber's PC; a central transceiver unit located at a telephone central office and connected to the remote transceiver unit over a twisted pair network and also connected to a WAN; an authorization server that is connected to the WAN; and one or more OLSs, which may include Internet service providers, connected to the WAN. Security of transmission is provided through a method in which only subscriber transmissions directed to a session-specific OLS are allowed to pass through the central transceiver unit onto the WAN, and only unicast transmissions from authorized OLSs are allowed to pass through the central transceiver unit to the subscriber port of the remote transceiver unit. Broadcast transmissions are minimized in favor of unicast messages. The authorization server delivers the IP and MAC addresses of the session-specific OLSs and the subscriber's PC to the remote transceiver units.

Wide area network system providing secure transmission

A method of bit rate adaption between a user data rate and an adapter data rate using the ECMA 102 protocol. The user data is received from a user terminal at a user data rate, the rate adapted data is transmitted at an adapted data rate, and the adapted data rate is greater than the user data rate. The user data is either in a asynchronous or a synchronous format and contains a start element and at least one stop element. The method involves the steps of: (1) converting the user data into an intermediate data; (2) storing the intermediate data in a receive buffer; (3) only if the user data is in an asynchronous data format, adding stop elements to the intermediate data; (4) transferring the intermediate data in the receive buffer to an intermediate buffer; (5) constructing a frame using data from the intermediate buffer; (6) storing the frame in a transmit buffer, and; (7) transmitting the frame where the step of transmitting changes the frame into the rate adapted data.

Method of bit rate adaption using the ECMA 102 protocol

A method of bit rate de-adaption between an adapted data rate and a user data rate using the ECMA 102 protocol. The user data is transmitted from a data adapter to a user terminal at a first data rate, the adapted data is received by the data adapter at a second data rate, and the second data rate is greater than the first data rate. The adapted data contains a start element and a plurality of data elements while the user data contains a start element and at least one stop element. The method involves the steps of: (1) Receiving the adapted data at the second data rate; (2) Converting the adapted data into a frame; (3) Storing the frame in a receiver buffer; (4) Dissecting the frame into an intermediate data; (5) extracting the plurality of data elements from the intermediate data; (6) Storing the plurality of data elements in a transmit buffer; (7) Converting the first plurality of data elements to the user data by adding the second start element and the at least one stop element; and (8) Transmitting the user data to the user terminal at the first data rate.

Method of bit rate de-adaption using the ECMA 102 protocol

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Phoenix, AZ, United States of America

John Wesley Spenik