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Remote Wake Up
A standard of WfM that provides the ability either to remotely wake a
computer from a low-power sleep state or to remotely start a computer that
is turned off but connected to a power source. Remote Wake Up, typically
used to conserve power in large network organizations and to remotely
perform maintenance/configuration operations, must be supported by an
ACPI-compatible computer. Additionally, to start by a network connection,
the network adapter must support WOL. To start by a telephone connection,
the modem must support WOR.
RIMM
Rambus in-line memory module. A slim circuit board containing RDRAM
chips. RIMMs are plugged into sockets on the computer's system board to
add memory to the computer. They typically must be installed in matched
pairs, meaning two sockets forming a pair must contain RIMMs of identical
capacity, number of RDRAM chips, and speed. See also SIMM and DIMM.
RJ45
A form of connector resembling a standard telephone jack that is typically
used to connect Ethernet and Token Ring network adapters and cables.
Unlike a telephone jack, an RJ45 connector has eight wires instead of two,
four, or six.
ROM
Read-only memory. Memory that stores data and programs that cannot be
deleted or written to by the computer. ROM, unlike RAM, retains its contents
even after you turn off your computer. Some programs essential to the
operation of your computer reside in ROM.
RS-232
A long-established standard describing the interface for serial data
communication between computers and related devices. See also DCE and
DTE.
RTC
Real-time clock. Battery-powered clock circuitry on the system board that
keeps the date and time after you turn off the computer.
RTCRST
Real-time clock reset. A jumper on the system board that can often be used
for troubleshooting problems.