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9-90
Shared Service Cards Coral IPx Office Installation Manual
UNA/Bell and
Rela
y-2 (Universal Nig
ht Answering/Cen
tral Bell)
9
0
Incoming trunk calls may be directed to activate a relay contact at certain times of the
day (typically after normal business hours). The relay contact sounds a tone over a
paging or public address system, or operate a mechanical bell. Upon hearing the tone
or bell, the trunk is then answered by dialing a specific feature code at any station
allowed to answer calls.
Figure 9-27
and
Figure 9-28
illustrate connections to a contact operated tone signal
and to a mechanical bell. Note that due to electrical limitations, the contact may not
be used to switch loads requiring high voltage or high current. See
Relay Contacts
on
page 9-103
, for complete specifications. To operate a highly inductive load such as
a mechanical bell, the relay should operate an external, AC powered or non-inductive
relay with an appropriately rated contact, which in turn operates the mechanical bell.
Figure 9-27 UNA Bell -
Wiring to Tone Generator
Figure 9-28 UNA Bell -
Wiring to Mechanical Bell
Table 9-7 on page 9-17
lists the function of each interface connector, as they appear
on the card front panel,
Figure 9-8 on page 9-17
illustrates that connector.
...................................................................................................
5 External Connections
x
Contact
Operated
Tone
Generator
Audio
Input
Audio
Paging
Amplifier
U-RMI Office
Coral
IPx Office
RLY2
3
4
Relay
Contacts
U-RMI Office
Coral
IPx Office
x
RLY2
3
4
Relay
Power
Supply
Bell Power
Supply
Bell or
Chime
Relay
x
Relay
Contacts