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Meridian Digital Telephone IP Adapter Installation and Administration Guide 195
October 2001 Glossary
DB9 connector
A 9-pin connector labeled ADMIN that provides the RS-232 serial port
interface. This serial port connection can be used to configure a Remote Office
9150 unit that is directly connected to a PC.
DB25 connector
The DB25 connector on the RLC Multi-I/O cable–Enhanced is for future use.
DC
See direct current.
DHCP
See dynamic host configuration protocol.
digital linear tape
A high-capacity 1/2-inch streaming tape cartridge format.
digital signal processor
A special type of coprocessor that manipulates analog data, such as sound or
photographs, that has been converted to digital form.
DIMM
See dual in-line memory module.
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.
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).
DIP
A type of protective packaging for silicon memory chips that provides a safe and
convenient means of installing and removing the chip.