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edge switch 2/16 service manual Glossary–39
Glossary
ordered set
In Fibre Channel protocol, four 10-bit characters (a combination of data and special
characters) providing low-level link functions, such as frame demarcation and signaling
between two ends of a link. It provides for initialization of the link after power-on and for
some basic recovery functions.
original equipment manufacturer
OEM. A company that has a special relationship with computer producers. OEMs buy
components and customize them for a particular application. They sell the customized
computer under their own name. OEMs may not actually be the original manufacturers. They
are usually the customizers and marketers.
OS
See operating system.
OS/390™
See Operating System/390.
OSI
See Open Systems Architecture.
OSMS
See open systems management server.
out-of-band management
Transmission of management information, using frequencies or channels other than those
routinely used for information transfer.
P
packet
In Fibre Channel protocol, Logical unit of information (usually in the form of a data frame)
transmitted on a network. It contains a header (with all relevant addressing and timing
information), the actual data, and a trailer (which contains the error checking function, usually
in the form of a cyclic redundancy check), and frequently user data.
panel
A logical component of the interface window. Typically, a heading and/or frame marks the
panel as an individual entity of the window. Size and shape of the panel and its data depend
upon the purpose of the panel and may or may not be modified.
PC
See personal computer.