Cordless phones work by using radio waves to connect the portable handset to a base station. This base station is, in turn, connected to the public telephone network.
The Cordless Phone System: Key Components
A cordless phone system consists of two main parts:
- Handset: The portable part of the phone you hold and use to speak.
- Base Station: A stationary unit that connects to a power outlet and your phone line.
How the Connection Works
Here's a breakdown of how a cordless phone call is established:
- Initiating a Call: When you dial a number on the cordless handset, it transmits the information as radio waves to the base station.
- Base Station Transmission: The base station receives the radio signal from the handset. It then sends this information over the wired telephone network, connecting you to the desired phone number.
- Receiving a Call: When someone calls your phone number, the signal travels through the telephone network to your base station. The base station then transmits a radio signal to your handset, causing it to ring.
- Two-Way Communication: During the call, the handset and base station continuously transmit and receive radio signals, allowing for two-way communication.
Limitations of Cordless Phones
- Limited Range: Cordless phones have a limited operational range. The handset can only communicate with the base station if it's within a certain distance, usually within the same building or a short distance from the base station. This is because the radio signals weaken with distance.
- Interference: Other electronic devices or physical obstructions can interfere with the radio signals, potentially causing static or dropped calls.
Cordless Phone Technologies
Cordless phones have evolved through various technologies, including:
| Technology | Description |
|---|---|
| Analog | Older technology; prone to interference and eavesdropping. |
| DECT | Digital Enhanced Cordless Telecommunications; offers improved security, range, and sound quality compared to analog phones. |
| 2.4 GHz Digital | Uses the 2.4 GHz frequency band; may experience interference from other devices like Wi-Fi routers. |
| 5.8 GHz Digital | Operates on the 5.8 GHz frequency band; generally less prone to interference than 2.4 GHz phones. |
