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260
260.1
installing Options
Music On
Hold
Provision has been made to allow connection of a
locally provided external music source to provide Music-
On-Hold for held CO/PBX calls. Connection of the Music
Source is made at the Jl Block of the Main Distribution
Frame (MDF). The output signal level should be approxi-
mately 1 milliwatt with 8 ohms impedance. See Figure
260.3 and Table 240.3 for connection information to
MDF .
260.2
External Paging Speaker
When a PBS-S KTU is installed in the ES -6 - 1 KSU,
external paging with meet-me answer can be provided. The
PBS-S KTU contains a 1 -watt Amplifier and Control
Circuit for one-zone paging (when a l-watt amplifier is
insufficient, see Section 260.5.) The External Speaker
should be locally-supplied in correspondence to the output
impedance of 600 ohms. The Volume Control (VRl),
located on the PBS-S, provides a way to increase or de-
crease the output signal of the amplifier to the speakers.
To adjust output signal, turn VR1 clockwise to increase
signal, and counterclockwise to lower signal. An LED is
provided on PBS-S KTU to indicate when paging is being
used. When an External Page is answered (meet-me-answer),
the PBS-S is released to allow access for another page.
See Figure 2 60-3 and Table 240-3 for connection informa-
tion to MDF.
260.3 External Background Music when PBS-S KTU
is
Used
When a PBS-S KTU is installed, an external locally-
provided music source can be used to supply background
music over the External Paging System. The recommended
output of the music source is l-watt with 600 ohms im-
pedance. When external paging is accessed music is cut off
from the paging speaker. Connection is made on the Jl
block of the MDF. See Figure 260-3 and Table 240-3 for
connection information to MDF.
260.4 External Tone
Ringer
Provision has been made to allow connection of
locally provided External Tone Ringer to supply common
audible on all incoming CO/PBX calls. For this purpose a
relay contact is prepared on the CLK-S KTlJ. which
provides an interrupted closure (1 SEC. on/ 1 SEC. off)
during the CO/PBX Ring Cycle. The signal of the tone
ringer can be controlled by a locally provided control
switch. See Figure 260-3 and Table 240-3 for connection
information to MDF.
2605 External Paging Amplifier
The PBS-S
KTU contains a l-watt Amplifier and
control circuit for external paging. For applications where
1 -watt is insufficient, an external amplifier may be used.
Provision has been made to allow connection of a locally-
provided amplifier to the MDF for this purpose. The PBS-S
KTU is required when an external amplifier is used. See
Figure 2604 and Table 240-3 for connection information
to the MDF.
260.6
External Background Music when External
Amplifier is Used
To provide for background music with an external
amplifier installed, set the SW4 switch
io
the “ON” posi-
tion and the SW3 switch to the “OFF” position on the
PBS-S KTU. When background music is not required set
the SW3 switch to the “ON” position and the SW4 switch
to the “OFF” position. Music will be cut off from the
.
paging speakers when external paging is accessed. The
output level and impedance of the music source should
match the input level and impedance of the external
amplifier. See Figure 2604 and Table 240-3 for connec-
tion information to the MDF.
ON
c-.-..
OFF
ON - - OFF
SW3
SW4
Fig. 260-I PBS-S Switches for BGM
260-7
Power
Failure Telephones
ET-6-l Ke:J Telephone Sets cannot be used to
originate or answer calls during a commercial power
failure. Locally-provided single line telephone sets can be
installed for this purpose. The KSU provides automatic
power failure for CO/PBX lines
1
and 2. No optional KTU
is required. Connection of the Single Line Telephones is
made at the Jl block of the MDF. Single Line Telephones
with appropriate dials (rotary or DTMF) should be installed
if the capability of dialing out during a power outage is
desired. See Figtire 260-3 and Table 240-3 for connection
information to MDF.
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