Glossary
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FCA2384 PCI-X Host Bus Adapter for OpenVMS and Tru64 UNIX Installation Guide
Broadband
In data transmission, it denotes transmission facilities capable of handling
frequencies greater than those required for high-grade voice communications. The
higher frequency allows the carrying of several simultaneous channels.
Cladding
The dielectric material surrounding the core of an electrical fiber or material
surrounding the core of a fiber optic cable. It usually refers to diameter, often 125
m, measured in microns.
Connector
A mechanical device used to align and join two fibers together to provide a means
for attaching and decoupling it to a transmitter, receiver, or another fiber.
Core
The central region of an optical fiber through which light is transmitted.
Custom Device Module (CDM)
A CDM is the driver component in the NetWare Peripheral Architecture used to
drive specific storage devices attached to the HBA. See also NetWare Peripheral
Architecture.
Data Rate
The maximum number of bits of information that can be transmitted per second in
a data transmission link. It is typically expressed as Megabits per second (Mbps).
Device Driver
A software program that enables a personal computer to communicate with hard
drives, CD-ROM drives, printers, and other peripherals. Device drivers are stored
on a hard drive and are loaded into memory at boot up.
Duplex Cable
A two-fiber cable suitable for duplex transmission or transmissions in two
directions.
Duplex Transmission
Transmission in both directions, either one direction at a time (half duplex) or
both directions simultaneously (full duplex).
Fabric
A Fibre Channel interconnection method that allows multiple simultaneous and
concurrent data transfers between multiple hosts and/or storage devices connected
with a multi-port hub.
FC-AL
Abbreviation for Fibre Channel Arbitrated Loop, an interconnection scheme that
supports from 1 to 126 ports on a loop in a shared medium topology.
