Toshiba Strata AirLink DK280, Installation Manual

Page: 142 / 878

standard telephone loop voltage from -24V
to
extending the standard telephone circuit loop length
(including the resistance of the phone) from 600 ohms
to 1200 ohms. The features provided by the
apply to the RSTS circuits as well as the basic RDSU
standard telephone circuits. Install the
on the
RDSU in accordance with the following procedure.
1. Remove the from its protective packaging.
2. Remove the RDSU from its protective packaging.
Note:
RDSU connectors P6 and P7 are positioned
to allow installation
of
the only in the
proper position (Figure 4-21).
3. Mate the connectors R6 and R7 with the
RDSU connectors R6 and R7.
RSTS
Install the RSTS to add two standard telephone
circuits to the RDSU in accordance with the following
procedure.
1. Remove the RSTS from its protective packaging.
2. Remove the RDSU from its protective packaging.
Note:
RDSU connectors
-
P5 are positioned to
allow installation of the RSTS only in the
proper position (Figure 4-21).
3. Mate the RSTS connectors P2
-
P5 with the
RDSU connectors P2
-
P5.
External Options
None
4.7.2 RDSU Installation Procedures
Install the RDSU in accordance with the following
steps:
1. Remove the RDSU from its protective packaging.
WARNING
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.
.
3.
Ensure the SSTU subunit and optional
subassemblies are securely attached to the RDSU
(Figure 4-21).
4. Insert the RDSU into the appropriate slot, and
apply firm, even pressure to ensure proper mating
of connectors.
5.
After installing the RDSU gently pull the RDSU
outward. If the connectors are properly mated, a
light resistance will be felt.
4.7.3 RDSU Wiring
Refer to Chapter 7-Wiring Diagrams for RDSU
and secondary protector details.
The RDSU is registered for use with
or
type lines for off-premises stations (see
Table 7-2 of Chapter 7-Wiring Diagrams).
4.7.4 RDSU Programming Overview
Enter Code 27 in Program 03 for a non-optioned
RDSU, or enter Code 28 for an RDSU that support
hook call announce and data interface units.
To
program the RDSU standard telephone ports
(including the RSTS), see Subsection 5.5.4 (PSTU
and RSTU Programming Overview). To program the
RDSU digital telephone ports, see Subsection 5.3.4
(PDKU Programming Overview).
Note:
there are no RDSU options, Program 03 can
be skipped, and Program 91 can be run
instead.
4.8
The PESU) provides two standard interface circuits
(Circuits1 and 2) identical to PSTU circuits for
connection between standard telephones, or two-wire
devices, and the system. I t
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
P-P for the two standard interface circuits.
Stan da r
d/E I
ec t ro n
i
c Te
I
e
p
h
o n e
Interface Unit
(PESU)
The PESU does not support an HDSS console
connection or an external amplifier.
The PESU provides connectors to mount the
EOCU for Speaker Call Announce
2. Configure RDSU for options per Subsection 5.6.1.
to electronic telephones.
4-28
January 1996