HP 316095-B21 - StorageWorks Edge Switch 2/24 User Manual page 216

Glossary
bidirectional
In Fibre Channel, the capability to simultaneously communicate at maximum speeds (100
Mbps) in both directions over a link.
bit error rate
Also known as BER. Ratio of received bits that contain errors to total of all bits transmitted.
blocked port
Devices communicating with the port are prevented from logging into the Director or
communicating with other devices attached to the Director. A blocked port continuously
transmits the offline sequence.
bridge
Device that connects and passes packets between two network segments that use the same
communications protocol.
broadcast
Send a transmission to all N_Ports on a fabric.
broadcast frames
Data packet, also known as a broadcast packet, whose destination address specifies all
computers on a network. See also multicast.
buffer
Storage area for data in transit. Buffers compensate for differences in processing speeds
between devices. See also BB_Credit.
call-home
Product feature which enables the HAFM server to automatically dial out to a support center
and report system problems. The support center server accepts calls from the HAFM server,
logs reported events, and can notify one or more support center representatives.
central memory module card
Also known as CMM. Circuit card that provides the storage area for Fibre Channel ports to
deposit and retrieve Fibre Channel frames. Each port is allocated a portion of this memory
divided into a fixed number of frame buffers.
channel
Point-to-point link that transports data from one point to the other.
class of Fibre Channel service
Defines the level of connection dedication, acknowledgment, and other characteristics of a
connection.
Class F Fibre Channel service
Used by Switches to communicate across interswitch links (ISLs) to configure, control, and
coordinate a multiswitch fabric.
Glossary–2 ha-fabric manager user guide