DOCSIS and Cable Modems – How it works :: Anatomy of a Burst

February 22nd, 2009 by Brady


Previously I have discussed that cable modems share the upstream channel by using Time Division Multiple Access (TDMA).  This means that when a cable modem is not transmitting data its RF transmitter is turned off.  In order to transmit data it must transmit a burst of data which contains a REQUEST to the CMTS.  The [...]

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Published by Brady on Feb 22, 2009 under DOCSIS 101 | Post your comment now

DOCSIS and Cable Modems – How it works :: Cable Modem Registration

February 9th, 2009 by Brady


Through DOCSIS tutorial seminars, I have found the most effective way to bring someone up to speed on DOCSIS communications is by teaching the cable modem registration process. During the registration process, we will cover the RF physical layer, theDOCSIS Media Access Layer (MAC) and the Internet Protocol (IP) layer. Yes, the cable modem exercises the first three layers of the Open Systems Interconnection Reference Model (OSI Reference Model or OSI Model)…

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Published by Brady on Feb 9, 2009 under DOCSIS 101 | Post your comment now