g-42 McDATA® Sphereon 3032 and 3232 Fabric Switches Installation and Service Manual
Glossary
PWA See printed wiring assembly.
R
radio frequency
interference RFI. Electromagnetic radiation which is emitted by electrical circuits
carrying rapidly changing signals, as a by-product of the normal
operation, and which causes unwanted signals (interference or noise)
to be induced in other circuits.
RAM See random access memory.
random access
memory RAM. A group of computer memory locations that is numerically
identified to allow high-speed access by the controlling microproces-
sor. A memory location is randomly accessed by referring to its
numerical identifier (D). Contrast with read-only memory. See also
dynamic random access memory; nonvolatile random access mem-
ory; static random access memory.
R_A_TOV See resource allocation time-out value.
read-only memory ROM. An information storage chip with permanent memory. Stored
information cannot be changed or deleted except under special cir-
cumstances (D). Contrast with random access memory.
redundancy Performance characteristic of a system or product whose integral
components are backed up by identical components to which opera-
tions will automatically failover in the event of a component failure.
Redundancy is a vital characteristic of virtually all high-availability
(24 hours/7 days per week) computer systems and networks.
remote notification A process by which a system is able to inform remote users and
workstations of certain classes of events that occur on the system.
E-mail notification and the configuration of simple network manage-
ment protocol (SNMP) trap recipients are two examples of remote
notification programs that can be implemented on director-class
switches.
remote user
workstation Workstation, such as a personal computer (PC), using EFC Manager
application and Product Manager application software that can
access the EFC Server over a local area network (LAN) connection.