Chime/buzzer of wired doorbell transformer – VTech IS7121_-2-22 Installation User Manual
Page 15

5
Option 1: Ring the front doorbell of the existing wired
doorbell and the
IS7121 doorbell simultaneously.
Using another wire, slide one end of the metal part
underneath the metallic plate on the doorbell, then connect
the other end to the Trans terminal of your chime/buzzer unit
of the wired doorbell.
4.
View
Right
Angle
Adjustment
View
Left
Chime/buzzer of
wired doorbell
Transformer
Rear
Trans
Front
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