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Supported MIBs and RFC

12.0(3)T

Supported MIBs and RFC

The Cisco uBR7246 feature enhancements support the Radio Frequency (RF) Interface

Management Information Base (MIB). For descriptions of supported MIBs and how to use MIBs,

see Cisco’s MIB website on Cisco Connection Online (CCO) at the following URL:

http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml.

No RFCs are supported by this feature.

List of Terms and Acronyms

Ampliﬁer—Used on coaxial segments of a Community Antenna Television (CATV) plant to restore

signal levels lost due to attenuation through distance. Unfortunately, ampliﬁers amplify noise as well

as signal.

Branch Line—A coaxial cable that runs from a trunk line to a subscriber drop point. A branch line

is also known as “Feeder Cable.”

Cable Modem—Any device that modulates and demodulates digital data onto a CATV plant.

Cable Line Card—Modem front-end card of the cable router headend unit, plugged into the

midplane. Each Cable Line Card provides a number of radio frequency (RF) channels as external

interfaces.

Cable Router—A modular chassis-based router optimized for the data-over-CATV hybrid

ﬁber-coaxial (HFC) application.

CATV—Originally Community Antenna Television. Now used to refer to any cable-based

(coaxial/ﬁber) system provision of television services.

CDM—Cable Data Modem.

CDMTS, CMTS—Cable (Data) Modem Termination System.

Channel—A speciﬁc frequency allocation and bandwidth. Downstream channels used for television

in the US are 6 MHz wide. In Europe, downstream channel width is 8 MHz.

CLI—Command line interface.

Combiner Group—The return paths of several ﬁber nodes can be combined at a single point to

form one RF domain. This single point is called a combiner group. See also Spectrum Group.

CPE—Customer Premises Equipment. In the Cable Router application, this will usually be one or

multiple PCs located at the customer side.

Distribution Hub—A smaller or remote headend distribution point for a CATV system. Video

signals are received here from another site (headend), and redistributed. Sometimes a small number

of locally originated signals are added. Such signals can be city information channels, HFC cable

modem signals, and so forth.

Downstream—Set of frequencies used to send data from a headend to a subscriber.

Drop—A subscriber access point. The actual coaxial connection in the subscriber’s home.

Fiber Node, Node—An optical node located in the outside plant distribution system which

terminates the ﬁber-based downstream signal as an electrical signal onto a coaxial RF cable. Each

ﬁber node is deﬁned to support a certain serving area, either deﬁned by number of homes passed or

total ampliﬁer cascade (number of active ampliﬁers in the longest line from the node to the end of

the line).

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Cisco 7246 - uBR Router Manual de usuario Pagina 2