Service manual

Glossary
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Glossary
GLS card A G_Port, Longwave laser, Singlemode fiber variant of an ED-5000
Director GPM card. The card provides four longwave laser port
connections. Contrast with GSM card and GXX card.
GPM card See generic port module card.
G_Port See generic port.
graphical user
interface
A visually oriented interface where the user interacts with
representations of real-world objects displayed on the computer
screen.
GSM card A G_Port, Shortwave laser, Multimode fiber variant of an ED-5000
Director GPM card. The card provides four shortwave laser port
connections. Contrast with GLS card and GXX card.
GUI See graphical user interface.
GXX card A G_Port, miXed laser, miXed fiber variant of an ED-5000 Director
GPM card. The card provides three shortwave laser port connections
and one longwave laser port connection. Contrast with GLS card and
GSM card.
H
half-duplex The capability to communicate in both directions over a single
connection, but not simultaneously (except for link control frames).
Contrast with full-duplex.
Hardware Log A log recorded at the Element Manager application that displays a
history of FRU removals and replacements (insertions) for a director
or switch.
HBA See host bus adapter.
hexadecimal A computer numbering system with base of sixteen. Valid numbers
use the digits 0 through 9 and characters A through F.
high availability A director and switch performance feature characterized by
component redundancy and the ability to perform concurrent
maintenance. High-availability systems maximize system uptime
while providing superior reliability, availability, and serviceability.