DDC’s AFDX®/ARINC Part 7 Switch provides the key element of an AFDX network—the physical infrastructure to interconnect end systems and regulate. The AFDXEnd System Pro is certifiable to civil aerospace standards and enables safety-critical data transfer between a computer and an AFDX switch. 10// Mbit/s 24+1 port AFDX® switch for rapid system development of all technical functionalities of TTTech’s certifiable AFDX production switches.

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Avionics Full-Duplex Switched Ethernet

There can be one or more receiving end systems connected within each virtual link. AFDX was designed as the next-generation aircraft data network. There is no specified limit to the number of virtual links that can be handled by each end system, although this will be determined by the BAG rates and maximum frame size specified for each VL versus the Ethernet data rate.

Further a redundant pair of networks is used to improve the system integrity swithc a virtual link may be configured to use one or the other network only. Also sub-virtual links do not provide guaranteed bandwidth or latency due to the buffering, but AFDX specifies that latency is measured from the traffic regulator function anyway.

The drawback is that it requires custom hardware which can add significant cost to the aircraft. In one abstraction, it is possible to visualise the VLs as an ARINC style network each with one source and one or more destinations. Webarchive template wayback switxh CS1 maint: Through the use of twisted pair switc fiber optic cables, full-duplex Ethernet uses two separate pairs or strands for transmitting and receiving the data.

However, total bandwidth cannot exceed the maximum available bandwidth on the network. This is the maximum rate data can be sent, and it is guaranteed to be sent at that interval.


However, the number sub-VLs that may be created in a single virtual link is limited to four. Additionally, there can be sub-virtual links sub-VLs that are designed to carry less critical data. Office for Harmonization in the Internal Market. Virtual links are unidirectional logic paths from the source end-system to all of the destination end-systems. AFDX is a worldwide registered trademark by Airbus. Also the switch, having a VL configuration table loaded, can reject any erroneous data transmission that may otherwise swamp other branches of the network.

The service is based on standard IEEE Many commercial aircraft use the ARINC standard developed in for safety-critical applications. AgustaWestland asserts its independence in the cockpit”. Each virtual link is allocated dedicated bandwidth [sum of all VL bandwidth allocation gap BAG rates x MTU] with the total amount of bandwidth defined by the system integrator.

AFDX extends standard Ethernet to provide high data integrity and deterministic timing. Therefore, in a network with multiple switches cascaded star topologythe total number of virtual links is nearly limitless. In addition, AFDX can provide quality of service and dual link redundancy.

Avionics Full-Duplex Switched Ethernet (AFDX) – TTTech

Views Read Edit View history. Real-time solution on the A” PDF. Innovating together for the A XWB”. This ADN operates without the use of a bus controller thereby increasing afxx reliability of the network architecture. Each switch has filtering, policing, and forwarding functions that should be able to process at least VLs.

To get access to the document please fill in the following form. Multiple switches can be bridged together in a cascaded star topology. Ethernet family of local area network technologies.


In case you wish to receive additional information, send an e-mail to products tttech. Archived from the original PDF on The network is designed in such a way that all critical traffic is prioritized using QoS policies so delivery, latency, and jitter are all guaranteed to be within set parameters.

By using this site, you agree to the Terms of Use and Privacy Policy. The switches are designed to route an incoming frame from one, and only one, end system to a predetermined set of end systems. The switch must also be non-blocking at the data rates that are specified by the system integrator, and in practice this may mean that the switch shall have a switching capacity that is the sum of sfdx of its physical ports.

AFDX Switch A Pro This high-performance port switch is certifiable to civil aerospace standards and supports bandwidth-regulated traffic filtering and policing.

A similar implementation [ clarify ] of deterministic Ethernet is used on the Boeing Dreamliner. Archived copy as title All Wikipedia articles needing clarification Wikipedia articles needing clarification from September Retrieved from ” https: It utilizes dedicated bandwidth-regulated traffic control while providing deterministic Switfh of Service QoS.

It specifies interoperable functional elements at the following OSI reference model layers:. By adding key elements from ATM to those already found in Ethernet, and constraining the specification of various options, a highly reliable full-duplex deterministic network is created providing guaranteed bandwidth and quality of service QoS.

However, some features of a real AFDX switch may be missing, such as traffic policing and redundancy functions.