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.