RSTU: The RSTU does not have the
P-P or
130V P-P
jumper, like the PSTUl and
do. In its standard configuration, the RSTU
provides an 80-volt sine wave ring generator. An
optional
unit can be connected to the RSTU
to increase the loop voltage from -24V to
extending the loop length (including the resistance
of the phones) from 600 ohms to 1200 ohms.
only provides a 90-volt square wave
message waiting generator to drive standard
telephone
message waiting lamps. Only one
telephone per
port.
Standard telephones and other devices, except for the
and
The BGM source can only be
connected to circuit 2.
BGM, can be connected to any circuit on the RSTU,
and
controls and indicators are shown
in Figure 4-19, and RSTU controls, indicators, and
interface connectors are shown in Figure 4-20. The
controls, indicators, and interface connectors of each
of the PSTU versions and the RSTU are described in
Table 4-1 3.
Note:
For the system to recognize the DTMF tones
generated by a standard telephone (or any
other device connected to
a
PSTU or RSTU
port), a DTMF Receiver Unit (RRCS-4,
-8,
or
-12) must be installed on common control unit
(RCTUA, RCTUB,
4.6.1 RSTU,
and
PSTU
Hardware
Options
The RSTU and the PSTU support the following
hardware options:
Internal Options
-48 volt supply (see Subsection 4.6.1)
Install the
on the RSTU or
in
accordance with the following procedure.
1. Remove the
from its protective packaging.
,
2.
Remove the RSTU from its protective packaging.
Note:
RSTU connectors P6 and
P7 are positioned to
allow installation
of
the
only in the
proper position (Figure 18 and 4-20).
In
Figure 4-1 8
Interface Connectors
3. Mate the
connectors P6 and P7 (Figure
4-18 and 4-20) with the
connectors P6 and
P7.
External
Options
ring generator switch
and
Configure the
and
ring generator for
P-P or
P-P i n accordance with the
following procedure:
1. Remove the PSTUl or
from its protective
packaging
.
2.
Ensure the
switch is set to the
P-P)
position for initial installation. The “L”
P-P)
position is used i f devices connected to the
PSTUl or
experience ring trip.
Standard telephone message waiting lamp control
only with Release
3 and above software)
4.6.2 RSTU,
and
PSTU
Installation
Procedures
Install the RSTU,
or the PSTU
and
in accordance with the following steps:
Remove the PCB from its protective packaging.
The protective shield on the back of the
RSTU or PSTU is designed to protect the
installer from potentially hazardous ring
voltage. Do NOT remove this shield.
2. Ensure the SSTS or SSTU subunit is securely
attached to the RSTU or PSTU (Figures 4-19 and
3. Configure the RSTU or PSTU for options per
Subsection
4.
the RSTU or PSTW into the appropriate slot,
and apply firm, even pressure to ensure proper
mating of connectors.
4-20).
Summary of Contents for Strata AirLink DK280
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