Line card with modem interface

摘要

An apparatus and method for communications data over a voice-band communications loop. The apparatus includes a transceiver circuitry, a backplane interface circuitry, a backplane interconnection circuitry, and a signalling circuitry. The transceiver circuitry transmits and receives voice-band modulated data over the communications loop. The backplane interface provides for physical interconnection to the backplane. The backplane interconnection circuitry couples the transceiver circuitry and the backplane interface to each other for data transmission to enable the exchange of digital data between the transceiver and the backplane. The signalling circuitry transmits and receives POTS call control signals over the communications loop.