Pstu Wiring; Pstu Programming Overview; Standard/Electronic Telephone Interface Unit (Pesu); General - Toshiba Strata DK24 Installation And Maintenance Manual

6.21 Install the PSTU in accordance with the fol-
lowing steps:
1) Remove the PCB from its protective packag-
ing. The protective shield on the back of the
PSTU is designed to protect the installer from
potentially hazardous ring voltage. Do not
remove this shield.
2) Ensure that the PSTU subunit (SSTU) is se-
curely attached to the PSTU (Figure 6-7).
NOTE:
W1, the ring generator level option, should be
set in the H position (factory) for initial instal-
lation.
3) Insert the PSTU into the appropriate slot, and
apply firm, even pressure to ensure proper
mating of connectors.
4) After installing the PSTU, gently pull the PCB
outward. If the connectors are properly mated,
a slight resistance will be felt.

6.30 PSTU Wiring

6.31 Refer to Section 400-096-209 for PSTU wir-
ing/interconnecting details.
6.32 The PSTU is registered for use with 0L13A
type lines for off-premises stations.
6.33 To wire a separate Background Music source
to the PSTU circuit, refer to Section 400-096-208.

6.40 PSTU Programming Overview

6.41 The following programming parameters may
be specified for the PSTU:
Program 03
•
Specify Code 31 for all slots that have PSTUs
installed.
Program 10-2
•
Used to set standard telephone ringing option.
Programs 10-2 and 19
• • • • •
Used for BGM connection (PCTU4 only).
Program 31
•
Used to configure all PSTU ports connected to
voice mail or auto attendant devices (see Voice
Mail Installation, Section 400-096-208, for more
details).
7 STANDARD/ELECTRONIC TELEPHONE
INTERFACE UNIT (PESU)

7.00 General

7.01 The Standard/Electronic Telephone Interface
Unit (PESU), available with Release 2 and higher,
provides two standard interface circuits (1 and 2)
identical to PSTU circuits for connection between
standard telephones, or two-wire devices, and the
system. It also provides four electronic telephone
interface circuits (5 ~ 8) identical to PEKU circuits
for connecting electronic telephones and other
peripherals. The PESU provides a ring generator
that can be set for either 130V P-P or 190V P-P for
the two standard interface circuits.
•
The PESU does not support an HDSS console
connection or external amplifiers.
•
The PESU provides connectors to mount the
EOCU for Off-hook Call Announce (OCA) to
electronic telephones.
NOTE:
A CRCU (-4 or -8) must be installed on the
PCTU or PCTUS for the system to recognize
Dual-tone Multi-frequency (DTMF) tones sent
from standard telephones or other two-wire
devices.
7.02 The maximum number of PESUs allowed
per system is as follows:
System PESUs
DK24 3
DK24 5
DK56 8
DK96 12
7.03 PESU controls and interface connectors are
shown in Figure 6-8 and described in Table 6-D.

7.10 PESU Hardware Options

6-13
INSTALLATION-PCB
SECTION 400-096-206
SEPTEMBER 1992
Electronic
Std Telephone PCTU
6 12 (S)
10 20 (1, 2, 3, or 4)
16 32 (1, 2, 3, or 4)
24 48 (1, 2, 3, or 4)