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MOH/Night Transfer Control relay for the MOH
function. This feature requires the installation
of a PIOU, PIOUS, or PEPU PCB.
4A) Set PIOU or PEPU jumper plug
Pll
to
MAKE
or
BREAK
position as required:
l
MAKE
(M)-Shorts the normally open
contacts (pins 9 and 34) when MOH is
activated.
l
BREAK(B)-Opens
the normally closed
contacts (pins 9 and 34) when MOH is
activated.
4B) Solder PIOUS jumper
W2
to
MAKE
or
BREAK
position if required:
l
MAKE
(M)-Shorts the normally open
contacts (NHT and NHR) when any CO
line is in the hold condition.
l
BREAK (B)-Opens the normally closed
contacts (NHT and NHR) when any CO
line is in the hold condition.
5) MOH (CO line or intercom hold) is applied from
the PCTU or PCTUS through the KSU cabinet’s
backplane to the PEMU, PCOU, PEKU, PESU,
and PSTU to provide Music-on-Hold for E & M
I TIE lines, CO lines, electronic/digital tele-
phones, and single-line stations, respectively.
6) MOH is also applied through the PCTU Page/
Background Music (BGM) control to provide
I BGM to electronic/digital telephone speakers
and external page (refer to Paragraph 3.20).
3.20 Background Music (BGM) Options
3.21
The Background Music options allow music
to play over optional external speakers (external
page system) and/or electronic telephone speak-
ers. The system allows BGM to be configured any
of the three ways described below:
1) Configuration A-one music source: This
configuration allows BGM and MOH to share
the same music source (see Figure 8-4). With
thisconfiguration, the MOH/BGM musicsource
is connected to terminal P6 of the PCTU or
PCTUS PCB. The music source is sent to CO
I
lines/stations on hold, to electronic/digital
INSTALLATION-PERIPHERALS
SECTION 200-096-208
FEBRUARY1991
telephone speakers with BGM turned on (via
m 110 or m button) and to the external
page system via the PIOU, PIOUS; or’PEPU
optional interface unit (only one optional inter-
face PCB can be installed in a DK system).
2) Configuration B-two music sources: This
configuration allows the MOH source to be
connected to P6 of the PCTU or PCTUS PCB
(as in Configuration A) and a separate BGM
source to be connected to circuit 3 of a PEKU
or circuit 8 of a PESU PCB (see Figure 8-5).
With this configuration, the MOH source is
sent only to CO lines/stations on hold, while
the BGM source is sent directly to electronic/
digital telephone speakers and to the external I
page system via the PIOU, PIOUS, or PEPU
optional interface unit.
3) Configuration C-three music sources: This
configuration allows the MOH source to be
connected to P6 of the PCTU or PCTUSl (as
in Configuration A). The digital or electronic
telephone BGM source is connected to circuit
3 of a PEKU or circuit 8 of a PESU PCB (as in
Configuration B), and aseparate BGM source
I
is sent to the external page speakers via the
PIOU PCB (see Figure 8-6). When a separate
BGM source is connected to the PIOU, two
customer-supplied amplifiers are required to
drive the external speakers. One amplifier
drives the speakers for BGM when page is idle
and the other amplifier drives the speakers
during page. The PIOU switches BGM or
page to the external speakers via the zone
relays (the PIOUS and PEPU do not provide
zone relays, therefore Configuration C is not
possible with these PCBs).
3.22 MOH Source as Background Music Instal-
lation.
Install the MOH/Background Music option
in accordance with the following steps (refer to
Figure 8-3):
1) Ensure that the Music-on-Hold option is in-
stalled in accordance with Paragraph 3.12.
I
2) The output of the PCTU or PCTUSI page/
BGM control is applied through the backplane
8-3