Cisco IOS Release 12.3(21)BC and 12.3(21a)BC3 support the DOCSIS 3.0 Downstream Channel
Bonding feature, which is the key feature of the Cisco Cable Wideband Solution, Release 1.0.
In the Cisco Cable Wideband Solution, Release 1.0, the DOCSIS 3.0 Downstream Channel Bonding
feature supports downstream wideband channels consisting of multiple bonded RF channels. The
solution provides wideband data services over existing hybrid fiber coax (HFC) networks. With
wideband data services, multiple RF channels are aggregated into a single logical wideband
channel (bonding group) that delivers higher bandwidth to the wideband cable modem than was
previously possible with DOCSIS 2.0 technology. This aggregation of RF channels is referred to as
“channel bonding.”
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