FW 05.01.00 and SW 07.01.00 HP StorageWorks Directors and Edge Switches Glossary (AA-RU5JA-TE, June 2003)

Glossary
20 Directors and Edge Switches Glossary
online state
When the switch or director is in the online state, all of the unblocked ports are allowed to log in
to the fabric and begin communicating. Devices can connect to the switch or director if the port
is not blocked and can communicate with another attached device if both devices are in the
same zone, or if the default zone is enabled. See also offline state.
Open Systems Management Server
An optional feature that can be enabled on the director or switch through the Product Manager
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.
Open Trunking
Open Trunking is a licensed optional feature that enables load balancing of traffic flows. Open
Trunking monitors the average speed of data traffic through a flow. In the event of traffic
congestion, or if traffic on an ISL is disproportionate, a traffic flow is rerouted to a less
congested ISL. See also interswitch link.
Operating System/390
(OS/390) — An integrated, open-enterprise server operating system developed by IBM that
incorporates a leading-edge and open communications server, distributed data and file services,
parallel Sysplex support, object-oriented programming, distributed computing environment, and
open application interfaces.
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 and optical 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). See also inband management
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).