VTech Telecommunications Ltd 80-8584-00 Manuale Utente

9

If you already have a wired doorbell installed, follow the instructions below to install 

your new IS7121 doorbell unit.

Follow Step 1 through Step 6 in Doorbell installation above.
Insert a cross-head screwdriver to the side of battery compartment on the right, 

then twist and lift to loosen the screw and the metallic plates. Using a wire, slide 

one end of the metal part of the wire underneath the metallic plate, then twist 

the screws to secure. Connect the other end to the transformer.

1.
2.

Use 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.

3.

If you do not connect domestic power supply nor install AA batteries to the IS7121 

doorbell, only the existing wired doorbell will ring when being pressed.

•

Rotate

to Left

Angle

Adjustment

Rotate
to Right

Transformer

Transformer

Option 1: Ring the front doorbell of the IS7121 and existing wired doorbell   

  

 

simultaneously.

Option 2: Ring the rear doorbell of the IS7121 and existing wired doorbell    

  

simultaneously. 

Rear Trans

Front

Rotate

to Left

Angle

Adjustment

Rotate
to Right

Transformer

Chime/buzzer of wired doorbell

Chime/buzzer of wired doorbell

Rotate

to Left

Angle

Adjustment

Rotate
to Right

Transformer

Rear

Trans

Front