Abstract: A method of transmitting a frame on a communications medium by a node of a local area network in which a node without priorit employs a conventional IEEE 802.3 CSMA/CD medium-access method and a node with priority employs the conventional IEEE 802.3 CSMA/CD medium-access method less the steps of delaying transmission by minimum inter-frame and random back-off intervals.

Abstract: A data transmission apparatus and method in a pulse amplitude modulation (PAM) communication system that converts information to be transmitted into digital data, converts the digital signal into an analog signal, modulates the analog signal using a PAM modulator, and transmits the signal through a predetermined transmission channel. The method includes detecting distortion in the signal to be transmitted to the transmission channel; generating compensation information corresponding to the distortion detected; and changing digital data to be input to the PAM modulator based upon the compensation information generated.

Abstract: An Ethernet having an automatic detecting function of data transfer rate to efficiently manage the Ethernet, comprising a medium access controller for controlling Ethernet transfer protocol; a detector for automatically detecting a rate of data transfer received from a communication medium and driving said medium access controller to automatically control a transceiving path according to data transfer rate; an encoder/decoder enabled according to a transmitting/receiving mode selection by said medium access controller for encoding/decoding data to be suitable for the transfer protocol during data transceiving; and a data transceiver enabled according to a transmitting/receiving mode selection by said medium access controller and for transmitting and/or receiving the data to and/or from the communication medium during the data transceiving.

Abstract: A signal reception apparatus has an automatic level selection function. A comparing circuit compares a level of an input signal with a plurality of sensing levels and outputs a plurality of sensing signals in accordance with the compared result. An auto select level controller receives the plurality of sensing signals from the comparing circuit and selects one of the plurality of sensing levels in response to the plurality of sensing signals. The auto select level controller includes a plurality of flip flop stages. Each of the plurality of flip flop stages has a plurality of flip flops connected in series and is coupled to a corresponding one of the plurality of sensing signals from the comparing circuit. A circuit receives the output signals from the plurality of flip flop stages and selects one of the plurality of sensing levels in response to the inputted sensing signals.