Toshiba strata CT Installation & Maintenance Manual page 196

Peripheral Installation
Configuration C – Three Music Sources
This configuration enables the MOH source to be connected to the RCA jack of the Strata CT
processor PCB (as in Configuration A). The digital or electronic telephone BGM source is
connected to a 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.)
H
C
Figure 6-6
6-8
MOH SOURCE
1
RSTU/PSTU
25 Pair Connector
VA = 28, W-GN
VB = 3, GN-W
SLOT XX 2 , Circuit 2
Electronic/
Digital Telephone
Alternate
BGM Source
External Speaker
BGM Source
P23
BGM
BGM
Amplifier
Backplane Wiring
Installation Wiring
Strata CT Alternate Music Source Configuration C
B_C_U
RCA Jack
KSU BGM 600W
RCA Jack
VR1 (Volume)
VA
1 1
VB
RSTU or PSTU
2
in Slot XX
Page
600Ω
Page
Page
or BGM
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.
(see Figure 6-6).
Exchange Lines and
MOH
Stations On-Hold
BGM/Page
Electronic/Digital
Telephone Speaker
(BGM: #481 On/#480 Off)
Amplifier
To External
Page Speaker
(BGM When Page is Idle)
4300
Strata CT I&M Manual October 2000