Dell OptiPlex GX240 - Manual (Page 277)

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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.