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Old 15-01-2004, 15:48   #1
Andy C
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Join Date: Nov 2003
Location: Farnborough
Age: 52
Services: V6 Virgin 360, Volt Gig1 BB,
Posts: 272
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How do cablemodems work?

I've been trying to explain to a friend that our cablemodems use a MAC address to identify themselves on the network. I described it by saying we're basically on a LAN and allowed MAC addresses are issued with an IP - the DHCP server also sends a config file matching that allowed on the account with the specified MAC address. I also said our data is carried using DOCSIS. Still, I can't seem to get him to understand and he wants to make a wager that a cablemodem still uses a system similar to PPP.

So, can anyone point me to a detailed description on how a cablemodem network works and identifies itself over a CATV network please? Also how a modems MAC address is tied to a user account and config. Possible diagrams showing a users modem, UBRs and headends may be helpful.

Many thanks for any assistance.

Andy.
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