Specifications

Glossary
973Fabric OS Version 3.1.x/4.1.x Reference Guide
Switch
Hardware that routes frames according to Fibre Channel protocol and is controlled by software.
SWL
Short Wavelength. A type of fiber optic cabling that is based on 850-mm lasers and supports
1.0625-Gbps link speeds. May also refer to the type of GBIC or SFP.
See also LWL.
Tachyon
A chip developed by Hewlett-Packard, and used in various devices. This chip has FC-0 through
FC-2 on one chip.
Target
A storage device on a Fibre Channel network.
See also Initiator.
Tenancy
The time from when a port wins arbitration in a loop until the same port returns to the monitoring
state. Also referred to as loop tenancy.
Terminal Serial Port
May also be referred to as the console port. The lower serial port on the CP Card of the
StorageWorks Core switch. This port sends switch information messages and can receive
commands. Can be used to connect the CP Card to a computer terminal. Has an RS-232 connector
wired as a DTE device, and can be connected by serial cable to a DCE device. The connector pins
two and three are swapped so that a straight-through cable can be used to connect to a terminal.
The device name is ttyS0.
See also DCE port, modem serial port.
Throughput
The rate of data flow achieved within a cable, link, or system. Usually measured in bps (bits per
second).
See also bandwidth.
Topology
As applies to Fibre Channel, the configuration of the Fibre Channel network and the resulting
communication paths allowed. There are three possible topologies:
■ Point to point: A direct link between two communication ports.
■ Switched fabric: Multiple N_Ports linked to a switch by F_Ports.
■ Arbitrated loop: Multiple NL_Ports connected in a loop.