Tadiran Telecom Coral IPx 500, Installation Manual

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Shared Service Ports
9-77
UNA and
Relay-2 (U
niversal N
ight
Answering/
Centra
l Bell)
9
9.13
UNA and Relay-2
(Universal Night Answering/Central Bell)
0
The Coral IPx 500 provides, via the MSBipx, relay contacts for central ringing bell
interface.
An incoming call may be automatically directed to a central bell. When the bell rings,
anyone within that group may dial the feature code to pick up that call.
Calls may be answered after the attendant leaves or when a central bell is ringing.
Normally this feature is activated for incoming calls during the night answering
period. There are two ways to do this: group pickup and directed pickup.
Figure 9-19
is a simplified circuit diagram of the UNA and RLY2 relay contacts.
The relay provides form A (single pole, single throw and normally open) contacts for
activating external circuitry and devices. Operation of the relay is determined by the
system database. Contacts RLY2 are designated to operate in conjunction with UNA
for central ringing applications.
Figure 9-19 UNA & Relay
- Simplified Diagram
1 Introduction
2 Circuit Description
Auxiliary
Connector
RLY 2
UNA
or
Central Bell
Incoming Call
13
38