G L O S S A R Y - Cisco UBR7225VXR Hardware Installation Manual

Symbols
10-Mbps baseband Ethernet specification using two pairs of twisted-pair cabling (Category 3, 4, or 5):
10Base-T
one pair for transmitting data and the other for receiving data. 10Base-T, which is part of the IEEE
802.3 specification, has a distance limit of approximately 328 feet (100 meters) per segment.
100-Mbps baseband Fast Ethernet specification using UTP wiring. Like the 10Base-T technology on
100Base-T
which it is based, 100Base-T sends link pulses over the network segment when no traffic is present.
However, these link pulses contain more information than those used in 10Base-T. The 100Base-T
specification is based on the IEEE 802.3 standard.
IEEE standards for the definition of LAN protocols.
802.x
1000-Mbps Gigabit Ethernet specification using two strands of multimode or single-mode fiber-optic
1000Base-LX/LH
cable per link. To guarantee proper signal recovery, a 1000Base-LX/LH link cannot exceed 1804 feet
(550 meters) in length over multimode fiber or 32,810 feet (10 km) in length over single-mode fiber.
Based on the IEEE 802.3 standard with reach over single-mode fiber extended from 5 km to 10 km.
1000-Mbps Gigabit Ethernet specification using two strands of multimode fiber-optic cable per link.
1000Base-SX
To guarantee proper signal recovery, a 1000Base-SX link cannot exceed 1804 feet (550 meters) in
length. The 1000Base-SX specification is based on the IEEE 802.3 standard.
1000-Mbps Gigabit Ethernet specification that refers to the 1000Base-ZX, 1000Base-SX, and
1000Base-X
1000Base-LX standards for Gigabit Ethernet over fiber-optic cabling. The 1000Base-X specification is
based on the IEEE 802.3 standard.
1000-Mbps Gigabit Ethernet specification using two strands of single-mode fiber-optic cable per link.
1000Base-ZX
To guarantee proper signal recovery, a 1000Base-ZX link cannot be longer than 62.1 miles (100 km).
This is a Cisco specification.
A
Authorization, authentication, and accounting server.
AAA server
A status condition that shows that a module or port is experiencing an abnormal operating condition.
Alarm
See also
Australia/New Zealand.
AS/NZS
Asynchronous Transfer Mode. International standard for cell relay in which multiple service types
ATM
(such as voice, video, or data) are conveyed in fixed-length (53-byte) cells. Fixed-length cells allow cell
processing to occur in hardware, thereby reducing transit delays. ATM is designed to take advantage of
high-speed transmission media such as E3, SONET, and T3.
OL-17309-01
Critical alarm, Major alarm, and
Cisco uBR7225VXR Universal Broadband Router Hardware Installation Guide

G L O S S A R Y

Minor alarm.
GL-1