Toshiba Strata DK40 Installation & Maintenance Manual page 212

Peripheral Installation
Configuration C–Three Music Sources
This configuration enables the MOH source to be connected to the RCA jack of the DK40
KSU (as in Configuration A). The digital or electronic telephone BGM source is connected to
a KSTU3, RSTU, or PSTU PCB (as in Configuration B), and a separate BGM source is sent
to the external page speakers via the PIOU PCB
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 zone relays. (The PIOUS and PEPU do not provide zone
relays; therefore Configuration C is not possible with these PCBs.)
RSTU/KSTU3/PSTU
25 Pair Connector
VA = 28, W-GN
VB = 3, GN-W
SLOT XX 2 , Circuit 2
Figure 6-6
6-8
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
MOH SOURCE
1
Electronic/
Digital Telephone
Alternate
BGM Source
External Speaker
BGM Source
P23
BGM
BGM
Amplifier
Backplane Wiring
Installation Wiring
DK40 Alternate Music Source Configuration C
Music-on-Hold (MOH)/ Background Music (BGM) Options
(see Figure
DK40 KSU
RCA Jack
VR1 (Volume)
VA
1
* KSTU3, RSTU ,
VB
1
PSTU
2
in Slot XX
600Ω
Page
PIOU Only
Zone Relays
Activate with Page
Notes
1. An isolation transformer may be required if
connecting BGM source to a standard telephone port.
2. Program 19 assigns BGM Slot number.
6-6).
MOH Exchange Lines and
Stations On-Hold
BGM/Page
Electronic/Digital
Telephone Speaker
(BGM: #481 On/#480 Off)
Amplifier
Page
Page
or BGM
To External
Page Speaker
(BGM When Page is Idle)
Strata DK40 I&M Manual Spring 1999
1506