DECT Technology and the Power of Modern Wireless Intercom Systems.
Introduction:
DECT technology (Digital Enhanced Cordless Telecommunications) has been the backbone of reliable wireless communication in local environments for many years. It is designed for applications where stability, low latency, and efficient spectrum usage are essential. Thanks to its use of license-free frequencies and intelligent RF techniques, DECT has become a global standard for both consumer and professional applications.
In the professional market, particularly in broadcast and live event environments, DECT is widely used for wireless intercom systems, where reliability under all circumstances is critical.
How does a DECT system work:
In Europe, DECT operates in the 1880 to 1900 MHz frequency band, a license-free spectrum exclusively allocated to this technology. This ensures a relatively clean frequency range with minimal interference.
The technology is based on a combination of:
- TDMA (Time Division Multiple Access)
- FDMA (Frequency Division Multiple Access)
- TDD (Time Division Duplex)
This allows the available spectrum to be efficiently shared among multiple users.
System architecture:
A DECT system consists of:
- Base stations (Fixed Parts)
- Portable units such as handsets or beltpacks (Portable Parts)
Together, they form a cellular network, similar to GSM, where each cell typically covers a range from tens of meters up to approximately 300 meters.
Intelligent RF behavior: the key to reliability
Dynamic channel selection.
All DECT equipment continuously scans the RF environment and automatically selects the best available channel. This is based on signal strength (RSSI), actively avoiding interference.
Seamless handover.
During operation, devices automatically switch to a better channel or base station without any noticeable interruption for the user, ensuring a stable connection even while moving.
Efficient power usage.
With an average transmit power of approximately 10 mW, DECT is energy-efficient and minimizes interference with other wireless systems.
Why DECT is ideal for intercom applications:
Due to its combination of:
- Low latency
- High reliability
- Efficient spectrum usage
- Automatic interference avoidance
DECT is particularly well suited for professional intercom systems in environments such as:
- Live productions
- Sports events
- Theaters and concerts
- Broadcast studios
While DECT already provides a strong foundation, some intercom manufactor systems takes performance to the next level by adding advanced innovations.
ADR technology: the key differentiator
The most important innovation is ADR (Advanced DECT Receiver) technology.
This technology uses multi-diversity reception, combining multiple antenna elements to receive the signal.
Result:
- Significantly reduced sensitivity to multipath reflections
- Reliable operation in complex RF environments
- Stable communication where conventional systems struggle
This makes the system particularly suitable for environments such as:
- Stadiums
- Large-scale live events
- Industrial locations with heavy RF reflections
Enhanced robustness and capacity:
The system makes more efficient use of the available spectrum and supports multiple beltpacks per antenna without compromising performance. This results in:
- Higher capacity
- Better scalability
- Consistent performance under load
High audio quality and low latency
Thanks to a high-quality voice codec, the system delivers:
- Excellent speech intelligibility
- Very low latency (critical for intercom use)
- Efficient power consumption
Conclusion:
DECT technology provides a solid and proven foundation for wireless communication, offering reliability, flexibility, and efficient spectrum usage.
- Advanced ADR multi-diversity technology
- High RF robustness
- Excellent audio quality
- Flexible and scalable deployment