2. Cordless telephone
A cordless telephone is a portable telephone that uses radio waves, rather than a wire, to
communicate with a base station that is connected to a standard landline.
3. How Does it work?
The base receives the incoming call, converts
it to an FM radio signal and then broadcasts
that signal.
The handset receives the radio signal,
converts it to an electrical signal and sends
that signal to the speaker.
4. 43-50 MHz
Because of the low frequency, these phones have short ranges and
poorer sound quality.
900 MHz
The higher frequency gives it a greater range and better sound quality.
2.4 GHz or 5.8 GHz
Can operate over a greater distance and it is more secure than lower frequency
models.
frequency
5. 10 to 25
channels
• 43-50 MHz
phones, some
inexpensive
900 MHz
phones
20 to 60
channels
• most 900 MHz
phones
50 to 100
channels
• high-end 900
MHz and
2.4/5.8 GHz
phones
channels