Toshiba STRATA DK14 Installation And Maintenance Manual page 708

Glossary
HESB~LED
Term
HESB
HESC-65A
HHEU
HPFB
HVSU2
IMDU
ISDN
K4RCU, K5RCU
KCDU
KKYS
KSTU2
LATA
LCD
LCR
LDI
LED
GL-4
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.
Optional Reserve Power Battery Charger (DK14)—One or two can be connected to the
power supply to maintain normal operation during a power failure.
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.
Dual-Tone Multi-Frequency (DTMF) Receiver/ABR Tone Detector Unit—An optional PCB
installed on the TMAU motherboard. The K4RCU3A, K5RCU1A or K5RCU2A must be
installed to recognize Dual-Tone Multi-Frequency (DTMF) tones generated by a standard
telephone (or any other device connected to a standard telephone circuit) and it is required
for Direct Inward System Access (DISA) and DID. The K4RCU and K5RCU circuits are also
used to detect busy tone for the Automatic Busy Redial (ABR) feature and must be installed
to allow ABR to operate. K4RCU has four DTMF receivers and four ABR busy tone
detectors; K5RCU1A and 2A have five DTMF receivers and four ABR detectors.
CO Line/Digital Telephone Interface Unit (DK40)—The KCDU has two loop start CO line
circuits and four digital telephone circuits. The KCDU digital telephone circuits can support all
but one of the devices supported by either the PDKU or Base Unit integrated digital
telephone circuits: digital telephones, PDIU-DIs/PDIU-D12s, PDIU-DSs, ADMs, DDCBs and
RPCIs.
Modular add-on keys (KKYS1~3) or integrated circuit that installs onto the K4RCU3 to add
features to the DK40i (auto attendant, ACD/MIS).
The optional PCB provides four standard telephone circuits and it can only be installed in the
base unit. The KSTU2 supports the two-wire devices such as standard telephones, Auto
Attendant devices, voice mail machines, and facsimile machines. The KSTU2 can also
support an alternate Background Music (BGM) source on circuit four.
Local Access and Transport Area.
Liquid Crystal Display—The optional display on digital and electronic telephones that
displays calling information.
Least Cost Routing.
Long Distance Information.
Light Emitting Diode—Status indicators located on printed circuit boards (PCBs), digital
telephones, and electronic telephones.
Definition
Strata DK I&M 6/00