Tadiran Telecom FlexSet 280, Руководство пользователя

Страница: 115 / 132

Coral Terminal Equipment
10-5
CP
A In
st
all
ati
on
10
Figure 10-4
is a simplified circuit diagram of the External Paging Interfaces, and the Relay
contacts.
Audio signals from the Coral system are passed through the audio coupling transformer to the
interface. A direct current (DC) blocking capacitor protects the secondary winding of the audio
coupling transformer from conducting DC energy.
The relay provides form A (single pole, single throw, normally open; or SPST-NO) contacts for
activating external circuitry and devices. The relay is designated to operate in conjunction with
audio interface when the CPA is activated for external paging. Care must be taken not to
exceed the contact ratings listed in the Specifications (see page
10-13
).
The relay operates through pins 2 and 5, whether connected to the 600 Ohm audio outlet, or via
the Hi-Z (RCA) connection.
Figure 10-4 CPA Simplified
Paging & Relay Diagram
3 Circuit Description
Voice ON/OFF
5
2
4
3
RJ-11
T1
PC
M
FR
O
M
L
IN
E
RELAY
Normally Open
(pins 2/5)
DIGITAL-
ANALOG
CONVERTER
VOICE PAGE
Hi-Z
(RCA JACK)
VOICE PAGE
600 ohm
(pins 3/4)