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Telephones
and Peripheral Equipment
External Ringer (UNA Device)
Guidelines
External Ringer (UNA Device)
l
An external ringer (either audible ringing or a bell, buzzer, etc.) can be
used to alert users when Universal Night Answer (UNA) calls come in.
l
The CPC-M supplies a relay that activates when UNA calls are present.
This relay can be used to activate an external device (bell, buzzer. etc.).
Alternatively, this relay can be used to activate the audio output of an
amplifier when a UNA call is present.
l
The CPC-S does not have a UNA relay or separate ER audio aoutput. If
UNA is used with a CPC-S, the UNA external ringer audio output must be
directed out at the EPA connector. It is recommended
that the EPA output
be connected to a voice-activated
amplifier to eliminate background
"white" noise.
l
The contact rating for the 'Cl"(Cornrnon
1) and "Ml"(Make
1) terminals
is 30V DC, 1 amp (maximum)
(CPC-M only).
l
An external ringer device (bell, buzzer, etc.) is not provided with the DBS
824. It must be purchased separately.
lln~tallation of External Ringer Amplifier (CPC-S)
1. Connect the EPA connector to the audio in connector of the amplifier
device. (Note: This output is shared with the paging output.)
7
Installation of External Ringing Device (CPGM Qnly)
1. Connect the external ringer to the "Cl" and "Ml" terminals on the
Connector Panel. (See Figure 5-16.)
Note: Connecting the ringer to the "Cl" and "Ml" terminals provides a
"1 second on/3 seconds off" ringing pattern. Connecting
to "Cl" and
"Bl"(Break
1) terminals provides a "1 second off/3 seconds on" ringing
pattern.
2. Connect the external ringer to its DC power source.
Issued 3/l /95
DBS 824-l O-300
5-l 9
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