Toshiba strata CT Installation & Maintenance Manual page 374

Glossary
Term
HDCB
HDSS
HESB
HESC-65A
HHEU
H
HVSU2
IMDU
C
ISDN
LCD
LCR
LED
LSI
MDF
MDFB
MOH
OCA
OPS
GL-4
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.
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.
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.
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.
Headset/Loud Ringing Bell Interface—Subassembly that fits inside a
digital telephone or a 6500-series electronic telephone to allow a
headset or an external speaker box (HESB) to be connected to the
telephone.
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.
Remote Maintenance Modem Subassembly—A subassembly installed
on an Option Interface Unit (PIOU or PIOUS) that allows the system to
be connected with a remote administration/maintenance terminal or
DKi Admin/DKi Backup personal computer.
Integrated Services Digital Network.
Liquid Crystal Display—The optional display on digital and electronic
telephones that displays calling information.
Least Cost Routing.
Light Emitting Diode—Status indicators located on printed circuit
boards (PCBs), digital telephones, and electronic telephones.
Large Scale Integration—Related to circuit design technology. Strata
CT system printed circuit boards (PCBs) use LSI circuit design.
Main Distribution Frame—The wiring frame usually located in a phone
closet.
Door Phone Box—A peripheral two-way speaker box option.
Music-on-Hold—Customer-supplied music or announcements can be
sent to parties on-hold on Exchange lines or the intercom.
Off-hook Call Announce. There are two types: Handset OCA and
Speaker OCA.
Off-premises Station.
Definition
Strata CT I&M Manual October 2000