Abstract: The present application provides a variety of exemplary embodiments, such as modem systems, modem devices, modem connectors, host connectors, communication systems and communication cards. For example, there is provided a modem device for use to enable a host to communicate over a communication line, wherein the host has a host connector. The modem device comprises a line side circuitry capable of interfacing with the communication line; and a digital isolation barrier (DIB) coupled to the line side circuitry, the digital isolation barrier capable of being connected to a modem connector for connection to the host connector, wherein the digital isolation barrier is capable of isolating the modem connector from the line side circuitry. Moreover, the line side circuitry may include a line side DIB interface for communication with the digital isolation barrier. Also, the modem connector may be connected to the digital isolation barrier via one or more lines.

Abstract: An apparatus for reducing electromagnetic interference on signals being communicated through one or more communications conductors is disclosed. The apparatus of the present invention is preferably situated in a communications circuit having a first area for receiving one or more communications conductors and an intermediate ground, and a second area having a reference ground. The apparatus includes one or more first capacitors, where each first capacitor is coupled between a communications conductor and the intermediate ground, and a second capacitor coupled between the intermediate ground and the reference ground. In preferred embodiments, the first area is a telephone network voltage (TNV) area, the second area is a secondary extra low voltage (SELV) area, the first capacitors are regular high voltage capacitors, and the second capacitor is a Y capacitor.

Abstract: The present application provides a variety of exemplary embodiments, such as modem systems, modem devices, modem connectors, host connectors, communication systems and communication cards. For example, there is provided a modem device for use to enable a host to communicate over a communication line, wherein the host has a host connector. The modem device comprises a line side circuitry capable of interfacing with the communication line; and a digital isolation barrier (DIB) coupled to the line side circuitry, the digital isolation barrier capable of being connected to a modem connector for connection to the host connector, wherein the digital isolation barrier is capable of isolating the modem connector from the line side circuitry. Moreover, the line side circuitry may include a line side DIB interface for communication with the digital isolation barrier. Also, the modem connector may be connected to the digital isolation barrier via one or more lines.