Cisco Cisco uBR-MC3Gx60V-RPHY Broadband Processing Engine Guida All'Installazione
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Cisco uBR10-MC5X20S/U/H Cable Interface Line Card Hardware Installation Guide
OL-18277-03
Information on Cisco uBR10-MC5X20S/U/H Line Cards
Information on Cisco uBR10-MC5X20S/U/H Line Cards
The Cisco uBR10-MC5X20S, U and H cable interface line cards are 20 by 16 inch cards designed
specifically for the Cisco uBR10012 router. These cards transmit and receive RF signals between the
subscriber and the headend over hybrid fiber-coaxial (HFC) system.
specifically for the Cisco uBR10012 router. These cards transmit and receive RF signals between the
subscriber and the headend over hybrid fiber-coaxial (HFC) system.
Upstream data, from the subscriber, comes through the upstream ports (US0–US19) on the
Cisco uBR10-MC5X20S/U/H cable interface line card. The line card processes and configures the data
and sends it across the backplane to the WAN/backhaul card and out to the Internet.
Cisco uBR10-MC5X20S/U/H cable interface line card. The line card processes and configures the data
and sends it across the backplane to the WAN/backhaul card and out to the Internet.
Downstream data, to the subscriber, comes from the Internet through the WAN/backhaul card, and across
the backplane to the Cisco uBR10-MC5X20S/U/H cable interface line card. The
Cisco uBR10-MC5X20S/U/H card processes and configures the data and sends it out through the
appropriate downstream port (DS0–DS4) to be combined with the rest of the downstream signals in the
headend.
the backplane to the Cisco uBR10-MC5X20S/U/H cable interface line card. The
Cisco uBR10-MC5X20S/U/H card processes and configures the data and sends it out through the
appropriate downstream port (DS0–DS4) to be combined with the rest of the downstream signals in the
headend.
The Cisco uBR10-MC5X20S/U line cards use burst receivers that report unequalized Modulation Error
Ratio (MER). The Cisco uBR10-MC5X20H line cards (as well as the MC16C, MC28C, and MC28U line
cards for the Cisco uBR7246VXR) use burst receivers that report equalized MER. Equalized MER will
almost always be at least a few decibels (dB) higher than an unequalized MER measurement of the same
signal under identical conditions. This is normal. Many of our customers see a 2 to 4 dB difference
between the equalized MER reported by the MC5X20H, and the unequalized MER reported by the
MC5X20S/U on the same upstream. But, if significant channel response impairments are present, the
difference between equalized and unequalized MER can be substantially greater (10 dB or more in some
cases). This, too, is normal. For more comprehensive information, see
Ratio (MER). The Cisco uBR10-MC5X20H line cards (as well as the MC16C, MC28C, and MC28U line
cards for the Cisco uBR7246VXR) use burst receivers that report equalized MER. Equalized MER will
almost always be at least a few decibels (dB) higher than an unequalized MER measurement of the same
signal under identical conditions. This is normal. Many of our customers see a 2 to 4 dB difference
between the equalized MER reported by the MC5X20H, and the unequalized MER reported by the
MC5X20S/U on the same upstream. But, if significant channel response impairments are present, the
difference between equalized and unequalized MER can be substantially greater (10 dB or more in some
cases). This, too, is normal. For more comprehensive information, see
Cisco uBR10-MC5X20S
The Cisco uBR10-MC5X20S cable interface line card supports downstream and upstream traffic over
Data-over-Cable Service Interface Specification (DOCSIS)-based cable modem networks. The card
supports downstream channels in the 70 to 860 MHz range, and upstream channels in the 5 to 42 MHz
range. Each downstream port includes an onboard integrated upconverter. The Cisco uBR10-MC5X20S
cable interface line card supports Annex B radio frequency (RF) data rates, channel widths, and
modulation schemes and has DOCSIS MAC management and spectrum management capabilities.
DOCSIS 2.0, Asynchronous Time Division Multiple Access (A-TDMA) rates are also supported.
Data-over-Cable Service Interface Specification (DOCSIS)-based cable modem networks. The card
supports downstream channels in the 70 to 860 MHz range, and upstream channels in the 5 to 42 MHz
range. Each downstream port includes an onboard integrated upconverter. The Cisco uBR10-MC5X20S
cable interface line card supports Annex B radio frequency (RF) data rates, channel widths, and
modulation schemes and has DOCSIS MAC management and spectrum management capabilities.
DOCSIS 2.0, Asynchronous Time Division Multiple Access (A-TDMA) rates are also supported.
Cisco uBR10-MC5X20U and H
The Cisco uBR10-MC5X20U/H cable interface line card supports both DOCSIS and EuroDOCSIS cable
modem networks. The card supports downstream channels in the 70 to 860 MHz range, and upstream
channels in the 5 to 65 MHz range. Each downstream port includes an onboard integrated upconverter.
The Cisco uBR10-MC5X20U/H cable interface line card supports Annex B and Annex A radio
frequency (RF) data rates, channel widths, and modulation schemes and has DOCSIS MAC management
and spectrum management capabilities. DOCSIS 2.0, A-TDMA rates are also supported.
modem networks. The card supports downstream channels in the 70 to 860 MHz range, and upstream
channels in the 5 to 65 MHz range. Each downstream port includes an onboard integrated upconverter.
The Cisco uBR10-MC5X20U/H cable interface line card supports Annex B and Annex A radio
frequency (RF) data rates, channel widths, and modulation schemes and has DOCSIS MAC management
and spectrum management capabilities. DOCSIS 2.0, A-TDMA rates are also supported.
The Cisco uBR10-MC5X20H has double the line card CPU speed, memory, and flash memory as the
Cisco uBR10-MC5X20U, allowing support of Voice over IP (VoIP) at much higher call loads and a
higher percentage of modems running advanced DOCSIS features that typically consume line card CPU
resources.
Cisco uBR10-MC5X20U, allowing support of Voice over IP (VoIP) at much higher call loads and a
higher percentage of modems running advanced DOCSIS features that typically consume line card CPU
resources.