director 2/64 service manual

director 2/64 service manual Glossary–15
Glossary
nondisruptive maintenance
Ability to service FRUs (including maintenance, installation, removal and replacement) while
normal operations continue without interruption. See also concurrent maintenance.
N_Port
See node port.
offline sequence (OLS)
Sequence sent by the transmitting port to indicate that it is attempting to initialize a link and
has detected a problem in doing so.
OLS
See offline sequence.
Open Systems Management Server
An optical feature that can be enabled on the director or switch through the Product Manger
application. When enabled, host control and management of the director or switch are
provided through an open systems interconnection (OSI) device attached to a director or
switch port.
optical cable
Fiber, multiple fibers, or a fiber bundle in a structure built to meet optical, mechanical, and
environmental specifications. See also jumper cable, optical cable assembly, and trunk cable.
optical cable assembly
Optical cable that is connector-terminated. See also jumper cable, optical cable, and trunk
cable.
optical fiber connector
Hardware component that transfers optical power between two optical fibers or bundles and is
designed to be repeatedly connected and disconnected.
out-of-band management
Transmission of management information using frequencies or channels (Ethernet) other than
those routinely used for information transfer (Fibre Channel).
packet
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).