ARINC Specification 635-4

635-4 HF Data Link Protocols

Last Published: 
Monday, December 1, 2003
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This standard describes the functions to be performed by the airborne components of the HFDL to successfully transfer messages between HF ground stations and avionics systems on aircraft where the data is encoded in a bit-oriented format. ARINC 634 and ARINC 753 are companion standards.

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