A Flexible Real-Time Operating System for Demanding Communication Technology

With ellan:RTOS, we have developed a real-time operating system that has been running reliably in our custom communication systems for over 30 years. It was designed for high security, short startup times, efficient resource utilization, and flexible adaptability — without the drawbacks of classic PC operating systems such as slow boot phases, high power consumption, or unnecessary complexity.

Modular and tailored to the target system

ellan:RTOS is fully modular. Only the actually required stacks are integrated — from IP protocols to audio processing. The software is compiled together with the application directly into the final firmware. This guarantees minimal system load, maximum efficiency, and a clean separation between infrastructure and application.

ellan:RTOS System Architecture

Typical Function Modules (Selection)

🌐

TCP/IP Communication

UDP, ICMP, SNMP, VLAN, NTP, VPN

🔄

Routing

PPPoE, xDSL, DNS Proxy, NAPT

📞

VoIP Protocols

SIP, IAX2, H.323

📁

HTTP/FTP Server

Configuration, file exchange, updates

📧

Email Function

SMTP, POP3, IMAP for status messages

🔗

ISDN Support

S0, UK0, UP0, S2M (NT/TE)

🔌

USB & Serial Interfaces

Host, OTG, CAN, SPI, UART, MIDI, RS485

🎵

Audio/DSP Modules

Codec computation, echo cancellation, filters, equalizer

📡

Radio Modules

433/868 MHz, LTE, 5G, Satellite

⚙️

Parameter Management

XML, FTP, TFTP, Terminal

Energy Optimization and Restart Times

ellan:RTOS is designed for energy-optimized operation. It offers intelligent power management with battery charging via solar as well as extremely short response times on restart — ideal for off-grid or mobile applications.

Dual-CPU Architecture and Platform Independence

For more complex applications, ellan:RTOS can be coupled with a secondary CPU, e.g., for graphical user interfaces (Android/Linux), while real-time functions continue to be handled by the secure core. Porting to new platforms is efficient thanks to the modular structure.

Cooperation Models & Licensing

Our customers decide flexibly:

All variants are field-proven and can be supplemented with bootloaders, MAC assignment, and support packages.

Security by Design

Neural Structure of ellan:RTOS

The system supports hardware-based access controls, secure update procedures, optional stack-level encryption (e.g. CAN, VoIP), and isolation of critical communication paths through system architecture.

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