Architecture and Scope
Figure 1-1 presents a simplified view of the Cisco Cable Wideband Solution, Release 1.0. In Figure 1-1, two RF channels are bonded into a wideband channel (bonding group). The Cisco Cable Wideband Solution includes these major components:
• Wideband cable modem termination system (WCMTS)—Cisco uBR10012 router
• Cisco Wideband SPA (Shared Port Adapter) and Cisco Wideband SIP (SPA Interface Processor)
• Edge QAM (EQAM) device
• Wideband cable modem (WCM)
In Scope
The scope of the Cisco Cable Wideband Solution, Release 1.0, comprises fully tested and supported
Cisco and Scientific Atlanta components, as well as selected third-party components tested for
interoperability by Cisco. The following aspects of the solution are in scope:
• DOCSIS 3.0 Downstream Channel Bonding software
• One or more downstream wideband channels with RF channel bonding
• Wideband CMTS (Cisco uBR10012 router) including cable interface and network uplink line cards
• Cisco Wideband SIP and Cisco Wideband SPA
• Edge QAM device
• Wideband cable modem
• Wideband-related cable modem configuration file parameters
• Cisco IOS command set for wideband-channel configuration, provisioning, and maintenance
• Cisco IOS command set for wideband hardware monitoring, troubleshooting, and debugging
• MIBs for the wideband CMTS, wideband cable modem, and wideband channel and service statistics
Solution Key Features
The Cisco Cable Wideband Solution, Release 1.0, provides the following key features:
• Pre-DOCSIS 3.0 version of wideband cable that uses packet bonding
• Channel-bonded wideband downstream channels
• Traditional DOCSIS 2.0 upstream channels
• Solution can be deployed in parallel with DOCSIS 1.X/2.0 technology.
• Existing Cisco uBR10012 router (CMTS) can be upgraded to wideband CMTS with add-on
components.
• Modular CMTS architecture makes use of external edge QAM devices.
• Cisco uBR10012 router (CMTS) supports up to two Wideband SPAs in a Wideband SIP jacket card.
• Each Cisco Wideband SPA can support up to 24 downstream RF channels.
• Each Cisco Wideband SPA can support up 12 logical wideband channels (bonding groups).
• Cisco Wideband CMTS and line cards have built-in redundancy and resiliency features.
• Scientific Atlanta and third-party edge QAM devices are tested for interoperability.
• Linksys WCM300-NA, WCM300-EURO (for EuroDOCSIS), and WCM300-JP (for J-DOCSIS)
wideband cable modems support the receiving of up to eight RF channels, which can be bonded into
wideband channels. One traditional DOCSIS downstream channel is used for MAC management and
signalling messages.
• Linksys WCM300-NA, WCM300-EURO, and WCM300-JP wideband cable modems support one
primary bonded (wideband) channel for unicast and multicast traffic and up to two secondary
bonded channels for multicast traffic.
• Scientific Atlanta DPC2505 and EPC2505 wideband cable modems support one bonded
downstream channel consisting of two RF channels, and support one traditional DOCSIS
downstream channel for MAC management and signalling messages.
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