EMULEX MODEL 375 SAN STORAGE SWITCH
USER’S GUIDE APPENDIX E: GLOSSARY
EMULEX CORPORATION 71
PART NUMBER 00041392-002 REV. B
APPENDIX E Glossary
AL_PA or Arbitrated
Loop Physical Address
A one-byte value used to identify a port in an Arbitrated Loop topology.
The value of the AL_PA corresponds to bits 7:0 of the 24-bit Native
Address Identifier.
Arbitration The process of selecting one respondent from a group req uesting
service at the same time.
Close (CLS) An Arbitrated Loop protocol used to terminate a loop circuit.
Current Fill Word The fill word that the Loop Port State Machine uses when a fill word is to
be transmitted.
Duplex Cable Two fibers in one cable suitable for duplex transmission.
Fiber Optics Light transmission through optical fibers for communication or signaling
Fibre Channel Fibre Channel is a data transfer interface technology that maps several
common transport protocols including IP and SCSI, allow ing it to merge
high-speed I/O and networking functionality in a s ingle connectivity
technology. Fibre channel is an open standard as defined by ANSI a nd
OSI standards and operates over copper and fiber optic cabling at
distances of up to 10 Kilometers. It is unique in its support of multiple
interoperable topologies including point-to-point, arbitr ated-loop and
switching and it offers several qualities of service for network
optimization. With its large packet sizes, Fibre Channel is ideal for
storage, video, graphic and mass data transfer applications.
LED Light-Emitting Diode. A status indicator on a switch.
Gb/s Gigabits per second.
Node An entity with one or more N_Ports or NL_Ports.
Open (OPN) An Ar bitrated Loop protocol used to establish a loop circuit.
Protocol A data transmission convention which may include timing, control,
formatting, error detection with correction and data representation.
SCSI Small Computer System Interface. Standard interface for storage
modules.
SFP Small Form-Factor Pluggable transceiver. These transceivers are fully
compliant with FC-PI and MSA standards and occupy less than half the
board space of the existing GBIC products.
Topology The logical and/or physical arrangement of stations on a network. Fibre
Channel topologies include point-to-point, Arbitrate d Loop, and switched
fabric.
Transceiver A device that converts one form of signaling to another for both
transmission and reception. SFPs and GBICs are transceivers.