| 摘要 |
An apparatus (400) and methods for communicating data over a voice-band communications loop. The apparatus (400) includes a transceiver circuitry (421-424), a backplane interface circuitry (402), a backplane interconnection circuitry (413), and a signaling circuitry (431-434). The transceiver circuitry (421-424) transmits and receives voice-band modulated data over the communications loop. The backplane interface (402) provides for physical interconnection to the backplane. The backplane interconnection circuitry (413) couples the transceiver circuitry (421-424) and the backplane interface (402) to each other for data transmission to enable the exchange of digital data between the transceiver (421-424) and the backplane. The signaling circuitry (431-434) transmits and receives POTS call control signals over the communications loop.
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