Nortel RLC Installation And Administration Manual page 420

Glossary
Direct Current
DC, the electrical power used by computers, comes from a single source (such
as a battery) that provides a single voltage that stays at a constant level. AC, the
power provided by utility companies, must be converted to DC before it can be
used in computer systems.
Direct Memory Access
DMA speeds up system performance by moving blocks of memory around
inside the computer (typically between I/O devices and memory). This process
enables the microprocessor to spend its time performing other functions.
Directory Number
The number that identifies a phoneset on a switch. The directory number (DN)
could be a local extension (local DN), a public network telephone number, or an
automatic call distribution directory number (ACD-DN).
DLL
Refer to Dynamic Link Library.
DLT
Refer to Digital Linear Tape.
DMA
Refer to Direct Memory Access.
DN
Refer to Directory Number.
driver
A program that controls a device. Every device, whether it is a printer, disk
drive, or keyboard, must have a driver program. A driver acts like a translator
between the device and programs that use the device.
DSP
Refer to Digital Signal Processor.
394 RLC Installation and Administration Guide
Standard 4.0