Tadiran Telecom FlexSet 280, Руководство пользователя

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10-6
Coral Terminal Equipment
CP
A In
st
all
ati
on
10
The CPA provides a voice page interface for external paging and public address. The interface
supplies a line-level (-15dBm or 50-100mV), 600
Ω,
balanced or high impedance audio output,
and a S.P.S.T. - N.O. (form A) relay contact.
Figure 10-5
and
Figure 10-6
illustrate connections
to two typical examples of voice paging systems.
The audio output of the voice interface may be used to drive amplified speakers directly. The
number of speakers which may be driven varies from manufacturer to manufacturer. See the
speaker manufacturer’s literature for specific details.
The relay contact closes continuously during access to the voice page interface. Although not
always required, the relay contact is often utilized for “Mic Precedence” or “Mute Control”, to
mute background music during voice pages. Again, the control of high voltage, high current, or
inductive loads should be avoided.
Figure 10-5 CPA Wiring to
Paging Amplifier
Figure 10-6
CPA Wiring to
Amplified Speakers
4 External Voice Paging (Public Address)
Coral
system
CPA
Voice
3
4
2
5
Relay
Amplifier
control
Audio
pa
ging
amplifie
r
Balanced
600 Ohm
input
Coral
system
CPA
Amplified
speakers
Voice
3
4
2
5
Relay
Amplified
speaker
power supply
Balanced
600 Ohm
output