The correct answer is DECT.
DECT stands for Digital Enhanced Cordless Telecommunications. It is a standard for digital cordless phones that was developed in Europe in the 1990s. DECT phones are designed to be more reliable and have better sound quality than analog cordless phones. They also use less power, which means they can have a longer battery life.
CT0, CT1, and CT1+ are all standards for analog cordless phones. They are less reliable and have lower sound quality than DECT phones. They also use more power, which means they have a shorter battery life.
Here is a table that summarizes the key differences between DECT and analog cordless phones:
| Feature | DECT | Analog cordless phones |
|—|—|—|
| Technology | Digital | Analog |
| Reliability | More reliable | Less reliable |
| Sound quality | Better sound quality | Lower sound quality |
| Power consumption | Less power | More power |
| Battery life | Longer battery life | Shorter battery life |
I hope this helps!