VTech IS7121 Installation Guide

14
If you already have a wired doorbell installed, follow the
instructions below to install your new IS7121 doorbell unit.
Turn off the power supply to the existing wired doorbell.
Follow instructions in Install the doorbell wall mount cover
section.
Insert a cross-head screwdriver to the side of the battery
compartment on the right, then twist and lift to loosen the
screw and the metallic plate. Using a wire, slide one end of
the metal part of the wire underneath the metallic plate, then
twist the screw to secure. Connect the other end to
the transformer.
1.
2.
3.
Install the doorbell with an existing wired
doorbell (optional)
Transformer
Transformer
View
Right
Angle
Adjustment
View
Left
Transformer

VTech IS7121 Specifications

Frequency and Channels

transmit frequency (handset)	1921.536-1928.448 MHz
transmit frequency (telephone base)	1921.536-1928.448 MHz
transmit frequency (doorbell)	1921.536-1928.448 MHz
channels	5

Display

LCD resolution	128 (RGB) x 160 DOTS
LCD size	1.77 inches
LCD type	TFT PANEL

Power Requirements

handset battery	2.4V Ni-MH battery
doorbell battery	Two 2A batteries
base unit power adapter input	100-120V AC 50/60Hz
base unit power adapter output	6V DC @ 400mA
doorbell unit power adapter input	100-240V AC 50/60Hz
doorbell unit power adapter output	6V DC @ 600mA
charger unit power adapter input	117V AC 50/60Hz
charger unit power adapter output	6V AC @ 300mA

Memory

directory memory locations	50
directory memory digits	up to 30 digits
directory memory characters	15 characters
caller ID log memory locations	50
caller ID log memory digits	up to 24 digits
caller ID log memory characters	15 characters