Cisco Systems UBR7225VXR specifications GL-4

Glossary

HDLC	High-Level Data Link Control.
HFC	Hybrid fiber-coaxial.
HSSI	High-Speed Serial Interface.

I

IEC

IEEE 802.3

International Electrotechnical Commission.

IEEE LAN protocol that specifies an implementation of the physical layer and the MAC sublayer of the data link layer. IEEE 802.3 uses CSMA/CD access at a variety of speeds over a variety of physical media. Extensions to the IEEE 802.3 standard specify implementations for Fast Ethernet and Gigabit Ethernet.

ITU-T

ITU-T J.83 Annex A

International Telecommunication Union-Telecommunications Standardization Sector.

Series J.83 deals with the transmission of television, sound programming, and other multimedia signals. Annex A defines the management interface between the customer premises equipment and the Frame Relay network for European channel plans.

M

MAC

Major alarm

MER

Minor alarm

Media Access Control.

One of a group of alarm conditions that are considered the second most severe of all reportable alarms. Major alarms affect several subscribers who connect to the reporting node. You can use the show facility-alarm status Cisco IOS command to obtain more information about the problem.

See also Critical alarm and Minor alarm.

Modulation error ratio.

One of a group of alarm conditions that are considered the third most severe of all reportable alarms. Minor alarms affect a single or small number of subscribers who connect to the reporting node. You can use the show facility-alarm status Cisco IOS command to obtain more information about the problem. See also Critical alarm and Major alarm.

MSOMultiple system operator.

N

NCTA		National Cable Television Association.
NPE		Network processing engine.
NSE		Network services engine.
		Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide
	GL-4	OL-17309-02