
Inside a Cable Modem
• Interface
– Data passes through the MAC and goes into the computer
interface of the cable modem
– PCI bus, USB, Ethernet, HomePNA
• CPU - microprocessor
– Required for external cable modems
• Single-chip cable modem are emerging
– Combines the MAC, demodulator, burst modulator, CPU,
Ethernet/HomePNA/PCI/USB interfaces
– Additional parts such as memory, tuner, analog, power supply
will not be within the single-chip cable modem
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