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Loud Ringer and Paging
Once a Duet Plus has been successfully installed
as a loud ringer with external speaker, the option
is available to add voice paging without any
requirement for additional equipment. Simply
connect the dry or wet page port from the
telephone system to the AUDIO INPUT terminals
of the Duet Plus. Now the Duet Plus will provide
loud ringing and paging through the same
speaker.
From the equipment room, a three-pair cable can
provide power supply, dry contacts for ringing,
and paging audio. For maximum output power,
minimize wiring resistance between the Duet Plus
and the speaker. If telephone wire is used, use
all available conductors for power to minimize
resistance.
The warble tone and volume are adjusted as for
the previous application. The paging volume may
be set independently using the PAG VOL control
on the left side of the PC Board about midway
between top and bottom.
With a typical 8 Ω horn speaker, a Duet Plus will
provide sufficient ring and paging volume for
average ambient noise warehouses up to 10,000
square feet (930 square meters).
