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Glossary
E911 ~ ISDN
GL-4 Strata DK Programming 5/99
E911 Enhanced 911 operation that provides more complete locator information to the
responding agency.
EKT Electronic Telephone.
ESF Extended Super Frame.
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.
FCC Federal Communications Commission—The federal agency which regulates the
telecommunication industry. All Toshiba hardware is FCC listed or approved.
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.
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.
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.
HESC-65A 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.
HHEU 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.
HPFB Optional Reserve Power Battery Charger (DK14)—One or two can be connected to
the power supply to maintain normal operation during a power failure.
HVSU2 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.
IMDU 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 DK Admin/DK Backup personal
computer.
ISDN Integrated Services Digital Network.
Term Definition