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Cisco Cable Wideband Solution Design and Implementation Guide, Release 1.0
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Chapter 2 Cisco Cable Wideband Components
Wideband Cable Modems
The Linksys WCM300 wideband cable modem has two ports: an F-type 75 ohm connector provides a
cable network attachment, and an RJ-45 port provides a 10/100/1000 Mbps Ethernet connection to the
home or business. More information on the Linksys WCM300 wideband cable modem is available at:
http://www.cisco.com/en/US/products/hw/cable/index.html
Scientific Atlanta DPC2505 and EPC2505 Wideband Cable Modems
When used with the Cisco uBR10012 CMTS, the Scientific Atlanta DPC2505 (for DOCSIS) and
EPC2505 (for EuroDOCSIS) wideband cable modems support the receiving of one wideband channel.
For the Cisco Cable Wideband Solution, Release 1.0, the wideband channel consists of two bonded
downstream RF channels at 6 MHz per channel or at 8 MHz per channel.
In addition to the two bonded downstream RF channels, the Scientific Atlanta DPC2505/EPC2505
modem 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.
•
Unicast data can be received on any downstream channel.
•
DOCSIS 2.0 multicast data can be received only on the primary downstream channel.
The Scientific Atlanta DPC2505 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.
Figure 2-14
Scientific Atlanta DPC2505 Cable Modem
The DPC2505/EPC2505 wideband cable modem has an F-type 75 ohm connector for a cable network
attachment and has two data ports: a Gigabit Ethernet port with Auto negotiate and Auto-MDIX, and a
USB 2.0 port.
The DPC2505/EPC2505 also features front-panel LEDs to provide visual feedback of real-time data
transmission and operational status. The DPC2505 features WebWizard, a browser-based user interface.
WebWizard is a powerful tool that facilitates installation and troubleshooting. WebWizard eliminates the
need to load set-up software on the customer premises equipment (CPE).
