Patent ID: 7190704

Claim:
A sample and packet synchronization subsystem interfaced between a cable modem system and a plurality of bit-rate sampled data transmission devices, the sample and packet synchronization subsystem comprising: a transmit analog-to-digital/receive digital-to-analog converter sub-system, including respective buffers for storing digital sampled data, the respective buffers being coupled between a multiplexer/demultiplexer and respective standard code/decode and subscriber loop interface circuits, each standard code/decode and subscriber loop interface circuit being coupled to a respective bit-rate sampled data transmission device; and a digital signal processing subsystem, interfaced between the cable modem system and the transmit analog-to-digital/receive digital-to-analog converter sub-system, for transmission and reception through the cable modem system to and from a packet recipient, the digital signal processing subsystem: determining unsolicited cable modem system grant arrivals in response to a request from the bit-rate sample data transmission device; synchronizing the storing of sampled packets with the unsolicited cable modem system grant arrivals; and transmitting to the cable modem system upon receipt of an unsolicited cable modem system grant arrival, currently stored sampled packets for further transmission to the packet recipient over the cable modem system.