SA618 Full-Duplex Intercom Module: Simultaneous transmission and reception with zero latency, the preferred choice for professional communications

Introduction: Say Goodbye to “Walkie-Talkie” Delay, Embrace “Telephone-Like” Free Communication

In fast-paced and demanding professional environments, communication efficiency directly determines team productivity and safety. Traditional half-duplex walkie-talkies (PTT radios) have served us for decades with their “press-to-talk” model. However, in critical scenarios that require instant feedback, multi-person collaboration, and urgent interjection, their inherent transmission delay and “you talk, I listen” limitations are increasingly becoming a bottleneck.

Now, imagine a completely new way of communication: an intercom experience as free and smooth as a phone call. No more button pressing, no more waiting for your turn—multiple users can communicate naturally and bidirectionally at the same time. This is the revolutionary change brought by the NiceRF SA618 series full-duplex intercom modules. With the core advantage of “simultaneous transmission and reception, zero delay,” it sets a new benchmark in professional communications.

This article explores the technical essence of the SA618 series, analyzing how it leverages advanced full-duplex technology, echo cancellation algorithms, and a highly integrated design to deliver unparalleled communication solutions for emergency rescue, industrial dispatch, security monitoring, conferencing systems, and more. Whether you are a system integrator seeking peak performance, or an end user looking to enhance team efficiency, the SA618 series is your ideal choice.

1. Core Advantages of SA618: More than Just Full-Duplex

The SA618 series distinguishes itself in the field of professional communications through the integration of multiple industry-leading technologies. It is far more than a conventional full-duplex module — it is a highly integrated intelligent communication system.

1.1 True Full-Duplex Communication: No More Delay or Waiting

Traditional half-duplex walkie-talkies use TDD (Time Division Duplex), where transmission and reception share the same channel, resulting in no simultaneous transmission and inherent switching delays. The SA618 series adopts advanced FDD (Frequency Division Duplex) technology and AEC (Acoustic Echo Cancellation) algorithms to achieve true full-duplex communication,This enables:.

• Simultaneous Transmission & Reception: Independent TX and RX chains allow real-time bidirectional voice, just like a phone call.

• Zero-Delay Communication: Eliminates PTT switching delays, enabling instant command and feedback—crucial in emergency scenarios.

• Free Interjection: In group conversations, any participant can interrupt or add information at any time, avoiding misjudgments caused by incomplete or delayed information.

1.2 Powerful Multi-User and Networking Capabilities

The SA618 series supports up to 8 users speaking simultaneously in full-duplex mode, with an unlimited number of receivers. It also supports up to 3-level relay (Router) expansion, extending communication coverage and enabling large-scale wireless networks in complex environments.

1.3 Professional-Grade Echo Cancellation (AEC)

The SA618 integrates hardware echo cancellation circuits and advanced AEC algorithms to distinguish between voice and echo, effectively suppressing feedback and background noise, ensuring clear communication even in noisy environments.

1.4 Highly Integrated “All-in-One” Design

The SA618 series combines a high-speed MCU, high-performance RF chipset, professional audio codec, and PA amplifier in a compact module.

Advantages include:

• Simplified development with easy UART control commands.

• Compact size for handheld, wearable, and IoT devices.

• High reliability with reduced external components and interference risks.

2. SA618 Product Comparison: SA618F22 vs. SA618F30-C1

2.1 SA618F22: Low-Power, Cost-Effective Solution

The SA618F22 is a full-duplex module optimized for low power consumption and cost-effective performance. With a transmit power of 160 mW (22 dBm), it is particularly suitable for applications with stringent power and budget requirements. Despite its low power design, the module maintains a high receiver sensitivity of -117 dBm, ensuring stable and reliable short-to-medium range communication,Key application areas include: 

• Wireless conferencing systems: Delivering clear, seamless multi-user wireless communication in meeting rooms.

• Smart building intercom: Enabling low-latency voice communication and announcements within buildings.

• Wearable communication devices：Such as smart helmets and shoulder microphones, providing hands-free communication for frontline personnel.

• UAV voice/data transmission：Supporting real-time air-to-ground voice communication alongside data streaming.

For products targeting European and North American markets, NiceRF also offers the SA618F22-C1 version, which has obtained FCC ID and CE-RED certifications, facilitating global deployment of your products.

2.2 SA618F30-C1: High Power, Extended Range

With 1W TX power and -117dBm sensitivity, SA618F30-C1 delivers communication over several kilometers in open areas. Supporting 16K sampling, it offers near-natural voice quality. Best suited for:

• Emergency Response Command: Ensuring reliable communication between forward and rear command centers and rescue personnel in complex terrains.

• Outdoor Exploration and Surveying: Providing wide-area communication coverage for field operation teams.

• Large-Scale Event Security: Enabling seamless team coordination across expansive event sites.

• Industrial and Power Line Inspection: Supporting remote dispatch and safety monitoring across large factories or transmission lines.

3. Empowering Industries: Typical Application Scenarios

The SA618 series is widely adopted in scenarios requiring real-time, reliable communication:

• Emergency Rescue: Zero-delay ensures commanders and frontline teams stay synchronized.

• Industrial & Construction: Hands-free, crystal-clear communication in noisy worksites improves efficiency and safety.

• Professional Security: Real-time collaboration in malls, transport hubs, and events.

• Wireless Conference Systems: Reliable, cable-free communication for enterprises, education, and legal proceedings.

4. Conclusion: Choose SA618, Enter the Era of Professional Communication

From half-duplex to full-duplex, this is not just an upgrade, but a revolution in communication experience. With its simultaneous transmission, zero delay, multi-user concurrency, and highly integrated design, the NiceRF SA618 series eliminates the limitations of traditional radios, delivering true “telephone-like” communication.

Whether you need reliable voice functionality for integration into your products, or a professional communication system for harsh environments, the SA618 is your trusted choice.

Visit WWW.NICERF.COM to learn more about SA618 and request tailored wireless solutions from our expert team.

https://www.nicerf.com/products/?keywords=SA618F22

https://www.aliexpress.com/store/1100701506

https://www.nicerf.com/products/?keywords=SA618F30-C1

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