Toshiba Strata DK 280 Installation Manual page 860

DID Line: Direct Inward Dialing line.
DISA: Direct Inward System Access-A feature that
allows an outside party to access Strata DK280
internal stations or outgoing CO lines without
having to go through an operator or automated
attendant. An optional security code may be set to
prevent unauthorized access to outgoing CO lines
for through system calling.
EOCU: Off-hook Call Announce Subassembly-An
optional upgrade to the Electronic Telephone
Interface Unit (PEKU) or Electronic Telephone/
Standard Telephone Interface Unit (PESU) that
enables properly configured telephones (see
HVSU2) to receive Off-hook Call Announce (OCA)
calls.
DK: Digital Key.
DKT: Digital Telephone.
FCC: Federal Communications Commission-The
federal
agency which regulates
the
telecommunication industry. All Toshiba hardware
is FCC listed or approved.
DKSUB280: Base Cabinet-Unit that houses the
Common Control Unit (RCTU), as well as six
universal slots for station, line, and option PCBs.
The Base Cabinet also contains a power supply
that provides power for all of the stations and
peripherals connected to the base cabinet PCBs.
HDCB: Electronic Door Phone/Lock Control Unit-A
peripheral hardware unit compatible with
designated electronic telephone circuits that
supports optional door phones (MDFBs) and
provides door lock control.
DKSUE280 or DKSUE424: Expansion Cabinet-
Optional unit that has six universal slots for
station, line, and option PCBs. The expansion
cabinet has a power supply that furnishes power
for all of the stations and peripherals connected to
the expansion cabinet PCBs. As many as five
expansion cabinets can be added to the system.
HDSS: Electronic Direct Station Selection Console-A
device that helps facilitate the processing of a
heavy load of incoming calls. The HDSS console
connects only to designated electronic telephone
circuits, and is associated with electronic
telephones.
[DN]: Directory Number.
DNIS: Dialed Number Identification Service-
Telephone number of called party is sent to the
DK280 over incoming DID or tie lines. This feature
is provided by some long distance telephone
companies.
HESB: External Speaker Box-A speaker/amplifier
that can be configured with the system to provide
a variety of functions, such as a paging speaker
and/or Background Music (BGM) speaker.
HESG65A: A cable used to connect an HHEU-
equipped digital telephone or an HHEU-equipped
electronic telephone to the external speaker box
(HESB) for the Loud Ringing Bell feature.
DPFT: Power Failure/Emergency Transfer Unit-An
HHEU: Headset/Loud Ringing Bell Interface1
optional backup unit that provides emergency
Subassembly that fits inside a digital telephone or
service during power failures by automatically
a 6500-series electronic telephone to allow a
connecting up to eight standard telephones to
headset or an external speaker box (HESB) to be
designated CO lines.
connected to the telephone.
DSS: Direct Station Selection-Feature which allows a
telephone user (as well as a DSS console and
ADM user) to call another station with the touch of
a flexible feature button.
DTMF: Dual-tone Multi-frequency-Push-button tone
dialing.
.DVSU: A subassembly that equips a digital telephone
with the capability to receive Speaker Off-hook
Call Announce (OCA) calls. DVSU is not required
to receive Handset OCA (HS-OCA).
HVSUS: Subassembly that fits into a 6500-series
electronic telephone enabling it to receive Off-
hook Call Announce (OCA) calls. The telephone
must be connected to an Electronic Telephone
Interface Unit (PEKU) or a Standard
Telephone/Electronic Telephone Interface Unit
(PESU) equipped with an Off-hook Call Announce
Subassembly (EOCU) to receive OCA, and must
have three-pair wiring.
EKT: Electronic Telephone.
IMDU: Remote Maintenance Modem Subassembly-A
subassembly installed on an Option Inter-face Unit
(PIOU or PIOUS) that allows the system -to be
connected with a remote administration/
a-2
January 1996