VTech IS7121 Installation Guide

6
18
inches
50 degrees
63 inches
20
inches
Shooting area
Avoid mounting it to where it is exposed to direct sunlight.
Avoid mounting it to where reections may be caused by
sunlight, for example, opposite to a white wall.
Avoid placing other cordless devices near the doorbell.
They may cause interference.
Two built-in infrared LEDs are for night vision. Make sure the
surrounding light source is sufcient for infrared operation.
Test at the front door to determine when the infrared LEDs
turn on. When they are in operation, they turn red.
•
•
•
•
When you check for the desirable location to install the doorbell:
Make sure the visitor is standing in a reasonable distance
away from the doorbell.
•
Infrared LEDs

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