Anatomy of a Cordless Telephone

To explain the cordless phone parts, we have
Your General Electric (GE) will be displayed from the inside.
It was created in 1993 and operated in year 43から50 MHz range.

As mentioned earlier, based on all cordless phone
Phone. Let's look at these individual parts.

Based

Plugged into the cordless phone base unit
Telephone wall jack.

If the base open, and expose the circuit board, please see
Some components, to perform the functions of the base:


* Telephone line interface - to receive, send to phone
Signals through a telephone line.

* Radio
amplify the signal from the o-line to mobile
Interface, user controls and speaker phone (if it exists).
Receiving radio signals broadcast from the library
Phone.

* Power supply - low voltage power circuit
Mobile phone battery charger.

Phone interface

A telephone line interface components do two things. First
Send a signal to the bell ringer (if applicable, on the base) or
Radio components for broadcast to mobile phones. This
You can find the incoming call. Second,
Electrical and telephone lines to send a small change to receive
Based wireless components to the current. When
When you talk, cause a small change in the flow of electricity
Phone lines will be sent to these changes and the original.
The same happens when you speak the caller.

Radio components


To receive electrical signals from the radio components
Telephone line interface and user control (keypad button).
Radio waves and convert the signal components to radio
Broadcast through the antenna. Radio components using silica
To set the radio frequency to send a crystal
Received. 2 will be sent to one single crystal
Receives the signal and one signal. Remember basic
Pair of runs on a mobile phone frequencies and can be
Talk the same time (double) listen. Radio
And increase components
The strength of electrical signals received.

Power Components

DC low voltage transformer supplies the necessary power cube
The electrical components on circuit boards. Power
Work on the circuit board components using the Cube's power
Re-charging electric current supply
Phone.

In addition to the above components, there are several bases
Odioanpusupika for phone features to drive the speaker
To dial, keypad, LCD display (LCD) for
Caller ID, light (LED) light-emitting diodes in the power / charger
Indicators for answering machine or the solid-state memory
Callback function.

Phone

Whole house with you, or can carry a mobile phone
Outside the scope of the base transmitter. Phone
All standard telephone equipment (with the speaker
Microphone, keypad) dialing, FM In addition to the equipment
Wireless transmitter / receiver.

When will you open the phone, please refer to these components:

* Speaker - convert sound into electrical signals
You ask.
* Mike - and pick up your voice, change it
Electrical signal.
* Pad - Dial type
* Ringer or buzzer - you know you can
Incoming calls.
* Wireless Components
o to amplify electrical signals from the microphone to
And speakers.
FM transmit and receive radio frequency Library
* LCD and LED displays - the indicator.
* Rechargeable batteries - to power
Phone.

Speaker

Speaker is to receive electrical signals from the audio
Components of the radio, amplifiers and to convert them
Sound. When, when you remove the speaker cover, please see
Large round hole in the middle of permanent magnets
Deep groove around the hole. This deep within
The coils are of copper wire that is attached to the grooved
Thin plastic membrane. Plastic film covering
Magnet and coil.

To hear the sound, the following events occurs:

1. Electrical signal, consisting of radio components.
Two. Electrical signals travel in a copper coil
Wire.
Three. Electrical signals that induce magnetic currents
Coil of wire to the magnet by it.
Four. Of the groove, the movement of magnetic coil
Within a permanent magnet.
Five. Movement of the plastic membrane that is connected to the coil
As changes in electrical current, the same frequency.
Six. The same as air movement to move the membrane
This frequency creates sound waves can be heard.

Mike

Mike, change the sound waves from your voice
The electrical signals sent to the audio amplifier
Radio components. Speaker Mike is basically
Works in reverse. At times, the sound waves from moving your voice
Membrane, a small electrical current in one of them
Compression or by moving a magnet inside a coil of wire
Membrane for carbon dust.

Keypad

You can dial the number keypad. This transfer
Pressure from the fingertips to the appropriate key
Electrical signal is sent to the radio components.
The following is the black rubber pads and circuit board
Conductive material under each button (shown above).
Behaves like a remote control keypad. When you press
When you click the button, and adhesion of the black material
To change its electrical conductivity. Send conductance
Components of an electrical signal indicating the radio,
That number is selected.

Ringer or buzzer

At times, mobile phones and other wireless components will receive a ring
Signal from the base, they send electrical signals to
Buzzer. These changes in the electrical signal to the buzzer
Does not sound like speakers. If you hear the beep
You can see that if someone calls you with. Some phone,
Must give the speaker and ringer sounds are not used
Is another ringer.

Radio components

Those components like wireless phones
Based - converts electrical signals from their
Mike and their FM broadcast radio signals
Crystals of the same frequency as the receiver of the base unit.
The components of the radio to receive radio signals in the same
From the base, such as frequency conversion crystal TV
These electrical signals are sent to the Speaker
And / or buzzer (ringer).

Memory to operate at its base and mobile phone dual
Is a pair of frequencies and the story can be heard
Same time.


Cases of double
Base:

* 44.32 MHz Transmitter
* 49.28 MHz receiver

Mobile:

* 49.28 MHz Transmitter
* 44.32 MHz receiver

LCD and LED display

Most cell phone one one or more light-emitting diode (LED) to light
In other words, when you call such a variety of things that
If you open the line and have the battery is low.

Some mobile phone LCD, which you can view the caller's number
ID as a functional, like a cell phone. LCD may
Reflective or so, the backlight when it can be seen, l room
ight lower.

Battery

All the battery power of mobile phones
Electronic components for mobile phones. All cordless
Mobile phones, rechargeable batteries (nickel-cadmium are
Nickel metal hydride or lithium). Low battery, to be executed
Normal light or indicator light on your phone
Blinks. Some mobile phone, "beep" sound may also indicate
Low battery. Based on the subsequent charge the battery
Cordless phone.

GE cordless phone, we were dissected from the year 1993.
Many of the same features with a modern cordless phone and
Same hardware. However, many of the electronic circuit
Once transistors, resistors and was achieved
Have been replaced by an integrated circuit capacitors.
You can either reduce the cell phone this progress
Same features and more functionality is the same size.

In summary, the cordless phone is basically a combination of
Phone and FM radio transmitter/receiver. Because
This is a radio transmitter, which broadcasts a signal over
Rather than concrete, open the airway between the base
Phone.

For public broadcasting, the other that is
People used to listen to phone conversations
Radio scanner. The big question is, look at the features
And security for cordless phones - DSS provides the best
Protection against eavesdropping.