Wideband Cable Modems; Linksys Wcm300 Wideband Cable Modem - Cisco WCM300 - Channel Bonded Cable Modem Implementation Manual

Wideband Cable Modems

Wideband Cable Modems
The Cisco Cable Wideband Solution, Release 1.0, supports the following wideband cable modem:
•
•

Linksys WCM300 Wideband Cable Modem

When used with the Cisco uBR10012 CMTS, the Linksys WCM300-NA (for DOCSIS),
WCM300-EURO (for EuroDOCSIS), and WCM300-JP (for J-DOCSIS) wideband cable modems
(Figure
channel and two secondary bonded channels.
Note Cisco IOS 12.3(21a)BC3 or a later 12.3BC3 release is required for support of the Linksys WCM300-NA,
WCM300-EURO, and WCM300-JP modems in wideband mode. In wideband mode, the MAC state of
the modem is w-online, and the Cisco uBR10012 uses the Cisco DOCSIS 3.0 Downstream Channel
Bonding feature.
For each wideband channel, the Linksys WCM300 wideband cable modem supports the reception of one
or more bonded RF channels. The Linksys WCM300 software supports the receiving of a 50 MHz
capture window of up to eight downstream channels at 6 MHz per channel or six downstream channels
at 8 MHz per channel. The total of the RF channels in the primary and secondary bonded channels must
comply with the 50 MHz capture-window limitation.
For wideband, the Linksys WCM300 also supports reception of one primary downstream
channel (traditional DOCSIS channel from the uBR10-MC5X20 line card) for MAC management and
signaling messages, and uses the associated traditional DOCSIS upstream channel for return data traffic
and signaling. The upstream channel works as it does in DOCSIS 2.0 cable modems.
Figure 2-13
The Linksys WCM300 is DOCSIS 2.0 compatible and can be used in this mode (for example, if the
modem is connected to a non-wideband Cisco CMTS or to a non-Cisco CMTS). The modem is also
backward compatible with existing DOCSIS 1.X networks.
The Linksys WCM300-JP supports J-DOCSIS channel operation: 6 MHz Annex B extension support
with a downstream frequency range of 88 to 860 MHz and an upstream frequency range of 5 to 65 MHz.
Cisco Cable Wideband Solution Design and Implementation Guide, Release 1.0
2-14
Linksys WCM300 Wideband Cable Modem, page 2-14
Scientific Atlanta DPC2505 and EPC2505 Wideband Cable Modems, page 2-16
2-13) support the acquisition of up to three wideband (bonded) channels: one primary bonded
Linksys WCM300 Wideband Cable Modem
Chapter 2 Cisco Cable Wideband Components
OL-10705-02