Toshiba Strata DK 24, Руководство по установке и обслуживанию

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INSTALLATION-SYSTEM DESCRIPTION
SECTION 400-096-202
SEPTEMBER 1992
2-12
PEKU (Electronic Telephone Interface Unit): The
PEKU provides eight circuits for electronic tele-
phones, an electronic DSS console (HDSS), an
electronic door phone/lock control unit (HDCB), a
Background Music source, and an amplifier for
two-CO line Conferences. The PEKU can be
configured for Off-hook Call Announce by install-
ing an optional Off-hook Call Announce upgrade
unit (EOCU).
EOCU (Off-hook Call Announce Upgrade Unit):
The EOCU is an optional Off-hook Call An-
nounce upgrade unit which mounts on top of the
PEKU or PESU "piggyback" style. It is required
on every PEKU or PESU that supports elec-
tronic telephones that should receive Off-hook
Call Announce. The EOCU has two OCA chan-
nels, which are shared by all circuits on a PEKU
or PESU.
PSTU 1 and 2 (Standard Telephone Interface
Unit): The PSTU provides an interface between
standard telephones and the system. It adds
eight standard telephone ports, and has a 20Hz,
190V peak-to-peak square wave ring generator
(no load). In addition, the PSTU provides sup-
port for numerous Toshiba-supplied and cus-
tomer-supplied peripherals, including:
•
Toshiba-supplied (optional):
§
Toshiba VP Systems
§
Power Failure Transfer Unit (DPFT)
•
Customer-supplied (optional):
§
Auto Attendant Device
§
Dictation Equipment
§
Fax Machine
§
Modem
§
Voice Mail Device
§
Background Music Source (Release 4)
NOTE:
A PSTU2 is equipped with a jumper plug to
change the ring generator no load output
from 190V peak-to-peak square wave (high)
to 130V peak-to-peak square wave (low).
The low setting is used with peripherals that
are sensitive to high-ring voltage. (Almost all
nel and does not require a dedicated CO line or
station port. Data transmission speed can be
set at 300 or 1200 bps full duplex.
PEPU (External Page Interface Unit): A reduced
version of the PIOU, the PEPU provides a circuit
interface with the peripheral options listed in
Table 2-C.
PESU (Standard/Electronic Telephone Inter-
face Unit): This optional PCB, which is avail-
able with Release 2 and higher software, pro-
vides the system with a combination of two
standard and four electronic telephone circuits.
In addition to standard telephones, the standard
telephone circuits can support optional hard-
ware peripherals such as voice mail devices
and fax machines. The PESU has a ring genera-
tor for the standard telephone circuits which can
be set for high- or low-ring voltage. The elec-
tronic telephone circuits on the PESU can sup-
port all of the devices that the PEKU can, except
for the electronic DSS console. The PESU can
be configured for Off-hook Call Announce (OCA)
by installing an optional OCA upgrade unit
(EOCU).
PCOU (CO Line Unit): The PCOU provides the
system with four loop-start CO lines and a
standard, built-in Automatic Busy Redial (ABR)
circuit. Each CO line can be programmed for
either rotary or dial pulse and has a three decibel
(dB) pad option switch to control excessive
loudness resulting from close proximity to the
PBX or central office. Each CO line circuit pro-
vides built-in gas tubes for limited protection
from lightning.
NOTE:
The two versions, PCOU1 and PCOU2, are
completely compatible and can be mixed
and/or interchanged in the same system.
PEMU (E & M TIE Line Unit): The PEMU provides
four E & M Type I signaling (2- or 4-wire, imme-
diate start) TIE lines. Each PEMU reduces the
system capacity by four CO lines and four sta-
tion ports in DK56 and DK96, and by four CO
lines and eight station ports in DK24.