There are lots of information about Type-B messages sent by airlines on IATA website but they have not stated under what communication systems (cable, teletype, intranet, internet, etc.) these messages are exchanged. What are these systems?

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    $\begingroup$ Proprietary networks, ARINC or SITA $\endgroup$ – user9394 Oct 16 '17 at 5:11

It's not just one. Private networks are used such as the IP-based ARINC AviNet, AFTN Teletype, etc.

For the specifics and standards, that information is not freely available (>\$3000). From IATA manuals, go to the Passenger tab, then the Security​ & Facilitation section. Or click here.

IATA's Passenger Data Exchange Support Plus package provides governments with all necessary standards, helpfully grouped in a single purchase.

The following example is for France (may not be current):

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There is also a presentation on the IATA website you may want to download and check.


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