123456 78910
JP1
JP2
C
LED1
VIKING©
VIKING
ELECTRONICS
HUDSON,
WI
54016
HANDSFREE TALK BACK
PAGING SYSTEM
POWER 13.8V AC
MODEL HF-3W
TALK BACK
VOLUME
PAGING
VOLUME
MIN
MAX
MIN
MAX
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PAGING
INPUT
PUSH TO
TALK
PAGING
HORN
PAGE
TRIGGER
MUSIC
INPUT
TALK BATTERY
SHUNT
ALERT TONE
VOLUME
Unused
PABX/KSU
Trunk Port
Single or Multi-
Line Phone
Existing Paging
System
or
Background
Music Source
Speaker Output
25AE
Paging Horn
(included)
White
Black
Optional Paging Port
Installation
600 Ohm Two-Way Paging Port
with Contact Closure. Remove
Talk Battery Shunt (JP1).
Contact Closure
Two-Way
Paging Port
JP1
JP2
Alert Tone
Volume
13.8V AC
Adapter
(included)
120V AC
OR
* To Optional
Push-To-Talk
Button
(not included)
** Optional 300AE
Paging Horn
***
TALK BACK
VOLUME
MIN MAX
PAGING
VOLUME
MIN MAX
IMPORTANT: Electronic devices are susceptible to lightning and power station electrical surges from
both the AC outlet and the telephone line. It is recommended that a surge protector be installed to
protect against such surges.
2
* Note: For loud background noise, an optional “Push-to-Talk” button may be added, using a N/O or
N/C switch or the Viking SW-2 panel mount switch (DOD# 844). Important: JP2 must be removed.
** Note: An optional 300AE Paging Horn may be used in place of the included horn to increase the
paging area, and voice intelligibility. Not compatible with ceiling speakers.
*** Note: If power supply hum/buzz is heard in the talk-back audio, earth ground screw terminal 9.
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