TTESwitch 3U VPX

3U VPX Deterministic Ethernet Switch for aircraft and in-vehicle electronics

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The TTESwitch 3U VPX is a rugged out-of-the-box high-performance production Ethernet switch specifically designed to meet the challenges of harsh environments and is ideally suited for building robust and reliable networks in rotorcraft, aircraft and land vehicles. The switch is manufactured according to TTTech’s highest quality standards and can be deployed in high-volume series production programs.

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This Deterministic Ethernet switch enables the design of highly dependable systems with focus on high availability, reliability, integrity, security, maintainability, and safety. It simplifies design of complex distributed systems and applications as well as processing of critical (rate-constrained, time-triggered) and non-critical Ethernet traffic. High-priority time-triggered messages are routed through the 3U VPX switch according to a predefined schedule with fixed latency and a transmission jitter in the sub-microsecond range. Rate-constrained messages are routed and policed according to their guaranteed bandwidth (such as ARINC 664 p7). All other Ethernet messages are forwarded when bandwidth is available.

The high-performance 3U VPX switch enables packet processing at all twelve fully-duplexed 1 Gbit/s Ethernet ports at full line speeds.

The built-in management module allows data loading as well as querying of the network status. Regarding security, the management module is protected by a fault-tolerant distributed unlocking mechanism. A comprehensive set of built-in tests (power-on built-in test, continuous built-in test, initiated built-in test) is available for health management functions.

Key Benefits

Supports Three Standardized Traffic Classes

  • Enables convergence of hard real-time communication (SAE AS6802 and ARINC 664 p7) and standard Ethernet traffic (IEEE 802.3) in parallel on the same network
  • 12 port 1 Gbit/s full-duplex enable 24 Gbit/s full wire-speed performance
  • Fixed latency and transmission jitter in the sub-microsecond range
  • Bandwidth efficiency while maintaining full determinism (up to 95 % utilization of available network bandwidth)

Built for Harsh Environments

  • Operational temperature: -40 °C to +85 °C
  • Storage temperature: -55 °C to +105 °C
  • Operating/non-operating humidity: 95 %
  • Vibration (random, all axis): 0.1 g²/Hz, 15 Hz to 2000 Hz
  • Operating shock: 40 g/11 ms half-sine
  • Altitude above sea level: 18,300 m (60,000 ft)
  • Qualified according to MIL-STD-810G

Compatibility and Ease of Integration

  • Future-proof 3U VPX Vita 46.0 form factor with conduction cooling
  • Compact and light weight (600g)

Safety & Availability

  • Supports safety and redundancy at the network level without application modification
  • The delivery of higher class traffic classes is guaranteed

Fast Updates and Diagnosis Through the Network

  • Built-in management module for extended diagnosis and data loading support
  • Querying of network status
  • Protected by a fault-tolerant distributed unlocking mechanism
  • Configuration data update through the network using TTELoad


  • Supports secure operation in critical networks
  • The less critical functions cannot impact highly critical functions
  • Synchronization, partitioning and real-time operation are secure against malicious access
  • MILS layers on top


  • TTEthernet is compatible with Ethernet standards (IEEE 802.3) and available off-the-shelf components
  • TTEthernet enables parallel traffic classes with different levels of quality of service according to proper standards (rate-constrained traffic according to ARINC 664 p7 and time-triggered according to SAE AS6802)
  • In addition, it provides compatibility with IEEE 1588 and a variety of established real-time Ethernet standards


  • Scalable network topology: star, line, tree, ring
  • Scalable QoS: single-, dual-, or triple-redundancy

Reduced Life Cycle Cost

  • Simplified testing
  • Incremental certification
  • Modularity

Integration Benefit due to Composability

  • Faster development because of real parallelization of subsystem development
  • Simplified integration testing
  • Improved determinism due to the capability of synchronous operation