AMC1 ACNS.B.DLS.B1.115 Presentation Layer Requirement

• ED Decision 2013/031/R found in: GM Remote Aerodrome Air Traffic Services (ED 2019/004/R) Issue 2 (Jul 2020)

AMC1 ACNS.B.DLS.B1.115 Presentation Layer Requirement ED Decision 2013/031/R (a) The ATN End System of the data link aircraft equipment should support a Presentation Protocol as specified in ICAO Doc 9705 (Edition 2), Sub-Volume IV, section 4.5, and listed in the following table: <table border="1" cellpadding="0" cellspacing="0" width="567"><tr><td valign="top" width="85"><p>Value (Hex)</p></td><td valign="top" width="95"><p>Abbreviation</p></td><td valign="top" width="387"><p>Full PPDU Name</p></td></tr><tr><td valign="top" width="85"><p>02</p></td><td valign="top" width="95"><p>SHORT-CP</p></td><td valign="top" width="387"><p>Short Presentation Connect, unaligned PER</p></td></tr><tr><td valign="top" width="85"><p>02</p></td><td valign="top" width="95"><p>SHORT-CPA</p></td><td valign="top" width="387"><p>Short Presentation Connect Accept, unaligned PER</p></td></tr><tr><td valign="top" width="85"><p>x2</p></td><td valign="top" width="95"><p>SHORT-CPR</p></td><td valign="top" width="387"><p>Short Presentation Connect Reject</p><p>Where x = reason code:<br/> 02: presentation-user<br/> 12: reason not specified (transient)<br/> 22: temporary congestion (transient)<br/> 32: local limit exceeded (transient)<br/> 42: called presentation address unknown (permanent)<br/> 52: protocol version not supported (permanent)<br/> 62: default context not supported (permanent)<br/> 72: user data not readable (permanent)</p></td></tr></table> (b) The ATN End System Presentation Protocol of the data link aircraft equipment should make use of the value ‘02’ to encode the SHORT-CPR PPDU.