The Cisco uBR-MC3GX60V cable interface line card transmits and receives RF signals between the subscriber and the headend over the hybrid fiber-coaxial (HFC) system. This DOCSIS 3.0 compliant line card is designed specifically for the Cisco uBR10012 universal broadband router and conforms to the Modular CMTS (M- CMTS) architecture.
The Cisco uBR-MC3GX60V cable interface line card has the capacity to support 72 downstream (DS) and 60 upstream (US) channels, depending on the license purchased. The line card supports 15 cable MAC domains (cable interfaces), and the DS and US channels can be associated with any of these 15 MAC domains. Each MAC domain supports a maximum of 32 DS and 8 US channels.
The Cisco uBR-MC3GX60V cable interface line card has 20 US spigots for RF connectivity, which are organized into 5 groups of 4 connectors each. Each connector group supports up to 12 frequency-stacked US channels, with a default configuration of 3 US channels per RF connector. The line card also provides the flexibility to configure lesser number of US spigots. For example, you can configure 10 US spigots with a frequency-stacking of 6 US channels per spigot.
The Cisco uBR-MC3GX60V cable interface line card has six Gigabit Ethernet (GE) interface ports organized into three pairs for DS connectivity. Each pair supports 1+1 redundancy and supports 24 DS channels in Annex B mode by default. The GE interfaces connect to an external Edge Quadrature Amplitude Modulation (EQAM) device and provide M-CMTS compliant Downstream External PHY Interface (DEPI) data. This data is directed to only one GE interface, though both the GE interfaces can be active at the same time.
Upstream data from the subscriber comes through the upstream interfaces (US0–US59) on the Cisco uBR-MC3GX60V cable interface line card. The line card processes and configures the data and sends it across the backplane to the WAN or backhaul card and out to the Internet.
Downstream data to the subscriber comes from the Internet through the WAN or backhaul card, and across the backplane to the Cisco uBR-MC3GX60V cable interface line card. The Cisco uBR-MC3GX60V cable interface line card processes and configures the data and sends it out through the appropriate GE interface ports (GE0–GE5) to the eQAM device to be sent to the HFC network.
The Cisco uBR-MC3GX60V cable interface line card supports both DOCSIS and EuroDOCSIS cable modem networks. The card supports downstream channels in the 55 to 999 MHz range, and upstream channels in the 5 to 85 MHz range. The Cisco uBR-MC3GX60V cable interface line card supports Annex A and Annex B RF data rates, channel widths, and modulation schemes and has DOCSIS MAC management and spectrum management capabilities. It also supports DOCSIS-3.0, A-TDMA, S-CDMA, downstream bonding, and upstream bonding rates.
The Cisco uBR-MC3GX60V cable interface line card provides a higher downstream frequency range and supports Annex A and Annex B RF data rates by interfacing with a DOCSIS 3.0 DRFI compliant EQAM, like the Cisco RF Gateway 10.
You must ensure that two DOCSIS Timing, Communication and Control (DTCC) cards are configured in the DOCSIS Timing Interface (DTI) mode on the Cisco uBR10012 router to make the Cisco uBR-MC3GX60V cable interface line card work with an EQAM device.
The Cisco uBR-MC3GX60V cable interface line card uses a front panel display (FPD) to show the licensing status information of the US and DS channels.
Figure 1 shows the face plate of the line card. The product ID (PID) of this card is UBR-MC3GX60V.
Figure 1. Cisco uBR-MC3GX60V Cable Interface Line Card
Table 1 shows the supported DOCSIS modulation schemes.
Table 1 Supported DOCSIS and EuroDOCSIS Modulation Schemes
|Cable Interface Line Card
||64 QAM1, 256 QAM
||QPSK, 8 QAM, 16 QAM, 32 QAM, 64 QAM
QAM = Quadrature Amplitude Modulation
Onboard Failure Logging
The On-Board Failure Logging (OBFL) feature enables storage and collection of critical failure information in the nonvolatile memory of a Field Replaceable Unit (FRU), like a route processor (RP) or line card. The Cisco uBR10000 series universal broadband router supports OBFL on PRE4, the Cisco SIP-600 jacket card, Cisco uBR-MC3GX60V, Cisco UBR-MC20X20V, and the Cisco uBR-MC5X20H cable interface line cards.
The OBFL stored data assists in understanding and debugging field failures upon Return Material Authorization (RMA) of a RP or line card at repair and failure analysis sites. OBFL records operating temperatures, voltages, hardware uptime, and any other important events that assist board diagnosis in case of hardware failures.
For more information on the feature, see the Onboard Failure Logging feature guide.
The Cisco uBR-MC3GX60V cable interface line card supports software licensing for the US and DS functionality. The software license restricts the US and DS channels the customer can use to 10 to 60 US channels and 16 to 72 DS channels.
The Cisco uBR-MC3GX60V line card uses a smart chip authentication device to prevent counterfeit line cards. A digital signature is embedded in the line card, and the Public Key Encryption techniques are used to verify the authenticity of the digital signature. The software licenses are physically stored on the line cards. You cannot transfer the software licenses between different line cards.
The Cisco uBR-MC3GX60V line card has a front panel four-character alphanumeric display to show the licensing status information of the US and DS ports. The first two characters of the display represent the DS license count and the last two characters represent the US license count.
Table 1 shows some of the US and DS channel combinations supported on the Cisco uBR-MC3GX60V line card and their corresponding license type.
Table 2 Cisco uBR-MC3GX60V Cable Interface Line Card License Information
|Front Panel Display