Cisco WCM300 - Channel Bonded Cable Modem Implementation Manual page 48

Chapter 3 Cisco Cable Wideband Architecture
Wideband Cable Modem Functionality
A wideband channel uses the same DOCSIS frame format as a traditional DOCSIS channel uses. The
channel just has more bandwidth. A new extended header for wideband has been added to the DOCSIS
protocol. The extended header defines the logical wideband channel and a sequence number that the
wideband cable modem uses for re-sequencing the wideband packets.
The CISCO-CABLE-WIDEBAND-MODEM-MIB for the wideband cable modem is supported and is an
extension to the existing cable modem MIB.
Cisco Cable Wideband Solution Design and Implementation Guide, Release 1.0
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