Allied Telesyn International Corp AT-WA7500 Installation Guide download pdf (Page 39)

10Base-T—IEEE 802.3 UTP Ethernet. Low-cost Level 3 or better UTP wiring

affords 100 meters (328 ft.) of point-to-point link segments. UTP uses RJ-45

connectors and sometimes 50-pin AMP connectors to a patch panel and runs at

10 MHz.

BASEBAND COAXIAL SYSTEM—A system whereby information is directly

encoded and impressed on the coaxial transmission medium. At any point on

the medium, only one information signal at a time can be present without

disruption.

BIT RATE (BR)—The rate of data throughput on the medium in bits per

second. Ethernet speciﬁes 10 million bits per second.

BIT TIME—The duration of one bit symbol (1/BR). Ethernet speciﬁes a bit

time of 100 ns.

CARRIER SENSE—In a LAN, an ongoing activity of a data station to detect

whether another station is transmitting.

CARRIER SENSE MULTIPLE ACCESS with COLLISION DETECT

(CSMA/CD)—This is the access method employed by IEEE 802.3 LAN

transceivers, by which multiple stations compete for use of the transmission

medium (coax cable) for data packet transmission. It provides for a level of

error detection should that transmission be corrupted or impeded by

contention for the transmission medium.

COLLISION—An unwanted condition that results from concurrent

transmissions on the physical medium.

COLLISION PRESENCE—Provides the ability to detect simultaneous

occurrence of Manchester-encoded data on the DI and DO and to report such

an occurrence as a collision.

COMPATIBILITY INTERFACE—The MDI coaxial cable interface and the

AUI branch cable interface, the two points at which hardware compatibility is

deﬁned to allow connection of independently designed and manufactured

components to the baseband transmission system.

Appendix B

Glossary

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Allied Telesyn International Corp AT-WA7500 Installation Guide Page 39