Publication: Magyar Közlöny
Issue: MK-2009-104 (Year: 2009, Number: 104)
Era: 2004-2010
Section: 
Paragraph Index: 2053

c) the active position is that character position in which the character about to be processed would appear if it were to be printed. The active position normally advances one character position at a time. The format effector characters are: BS, CR, FF, HT, LF and VT. DC — Device control characters — Control characters for the control of a local or remote ancillary device (or devices) connected to a data processing and/or telecommunication system. These control characters are not intended to control telecommunication systems; this should be achieved by the use of TCs. Certain preferred uses of the individual DCs are given below under Specific control characters. IS — Information separators — Control characters that are used to separate and qualify data logically. There are four such characters. They may be used either in hierarchical order or non-hierarchically; in the latter case their specific meanings depend on their applications. When they are used hierarchically, the ascending order is: US, RS, GS, FS. In this case data normally delimited by a particular separator cannot be split by a higher order separator but will be considered as delimited by any higher order separator. Specific control characters Individual members of the classes of controls are sometimes referred to by their abbreviated class name and a subscript number (e.g. TC5) and sometimes by a specific name indicative of their use (e.g. ENQ). Different but related meanings may be associated with some of the control characters but in an interchange of data this normally requires agreement between the sender and the recipient. ACK — Acknowledge — A transmission control character transmitted by a receiver as an affirmative response to the sender. BEL — Bell — A control character that is used when there is a need to call for attention; it may control alarm or attention devices. BS — Backspace — A format effector which moves the active position one character position backwards on the same line. CAN — Cancel — A character, or the first character of a sequence, indicating that the data preceding it are in error. As a result these data are to be ignored. The specific meaning of this character must be defined for each application and/or between sender and recipient. CR — Carriage return — A format effector which moves the active position to the first character position on the same line. Device controls DC1 — A device control character which is primarily intended for turning on or starting an ancillary device. If it is not required for this purpose, it may be used to restore a device to the basic mode of operation (see also DC2 and DC3), or for any other device control function not provided by other DCs. DC2 — A device control character which is primarily intended for turning on or starting an ancillary device. If it is not required for this purpose, it may be used to set a device to a special mode of operation (in which case DC1 is used to restore the device to the basic mode), or for any other device control function not provided by other DCs. DC3 — A device control character which is primarily intended for turning off or stopping an ancillary device. This function may be a secondary level stop, e.g. wait, pause, stand-by or halt (in which case DC1 is used to restore normal operation). If it is not required for this purpose, it may be used for any other device control function not provided by other DCs. Part I Annex 10 — Aeronautical Communications I-8-29 22/11/07 DC4 — A device control character which is primarily intended for turning off, stopping or interrupting an ancillary device. If it is not required for this purpose, it may be used for any other device control function not provided by other DCs. Examples of use of the device controls 1) One switching on — DC2 off — DC4 2) Two independent switchings First one on — DC2 off — DC4 Second one on — DC1 off — DC3 3) Two dependent switchings General on — DC2 off — DC4 Particular on — DC1 off — DC3 4) Input and output switching Output on — DC2 off — DC4 Input on — DC1 off — DC3 DEL — Delete — A character used primarily to erase or obliterate an erroneous or unwanted character in punched tape. DEL characters may also serve to accomplish media-fill or time-fill. They may be inserted into or removed from a stream of data without affecting the information content of that stream, but then the addition or removal of these characters may affect the information layout and/or the control of equipment. DLE — Data link escape — A transmission control character which will change the meaning of a limited number of contiguously following characters. It is used exclusively to provide supplementary data transmission control functions. Only graphic characters and transmission control characters can be used in DLE sequences. EM — End of medium — A control character that may be used to identify the physical end of a medium, or the end of the used portion of a medium, or the end of the wanted portion of data recorded on a medium. The position of this character does not necessarily correspond to the physical end of the medium. ENQ — Enquiry — A transmission control character used as a request for a response from a remote station — the response may include station identification and/or station status. When a “Who are you?” function is required on the general switched transmission network, the first use of ENQ after the connection is established shall have the meaning “Who are you?” (station identification). Subsequent use of ENQ may, or may not, include the function “Who are you?”, as determined by agreement. EOT — End of transmission — A transmission control character used to indicate the conclusion of the transmission of one or more texts. ESC — Escape — A control character which is used to provide an additional control function. It alters the meaning of a limited number of contiguously following bit combinations which constitute the escape sequence. Escape sequences are used to obtain additional control functions which may provide among other things graphic sets outside the standard set. Such control functions must not be used as additional transmission controls. The use of the character ESC and of the escape sequences in conjunction with code extension techniques is the subject of an ISO Standard. ETB — End of transmission block — A transmission control character used to indicate the end of a transmission block of data where data are divided into such blocks for transmission purposes. ETX — End of text — A transmission control character which terminates a text. FF — Form feed — A format effector which advances the active position to the same character position on a predetermined line of the next form or page. HT — Horizontal tabulation — A format effector which advances the active position to the next predetermined character position on the same line. Information separators IS1 (US) — A control character used to separate and qualify data logically; its specific meaning has to be defined for each application. If this character is used in hierarchical order as specified in the general definition of IS, it delimits a data item called a UNIT. IS2 (RS) — A control character used to separate and qualify data logically; its specific meaning has to be defined for each application. If this character is used in hierarchical order as specified in the general definition of IS, it delimits a data item called a RECORD. IS3 (GS) — A control character used to separate and qualify data logically; its specific meaning has to be defined for each application. If this character is used in hierarchical order as specified in the general definition of IS, it delimits a data item called a GROUP. IS4 (FS) — A control character used to separate and qualify data logically; its specific meaning has to be defined for each application. If this character is used in hierarchical order as specified in the general definition of IS, it delimits a data item called a FILE. LF — Line feed — A format effector which advances the active position to the same character position of the next line. NAK — Negative acknowledge — A transmission control character transmitted by a receiver as a negative response to the sender. NUL — Null — A control character used to accomplish media-fill or time-fill. NUL characters may be inserted into or removed from a stream of data without affecting the information content of that stream, but then the addition or removal of these characters may affect the information layout and/or the control of equipment. Annex 10 — Aeronautical Communications Volume III 22/11/07 I-8-30 SI — Shift-in — A control character which is used in conjunction with SHIFT-OUT and ESCAPE to extend the graphic character set of the code. It may reinstate the standard meanings of the bit combinations which follow it. The effect of this character when using code extension techniques is described in an ISO Standard. SO — Shift-out — A control character which is used in conjunction with SHIFT-IN and ESCAPE to extend the graphic character set of the code. It may alter the meaning of the bit combinations of columns 2 to 7 which follow it until a SHIFT-IN character is reached. However, the characters SPACE (2/0) and DELETE (7/15) are unaffected by SHIFT-OUT. The effect of this character when using code extension techniques is described in an ISO Standard. SOH — Start of heading — A transmission control character used as the first character of a heading of an information message. SP — Space — A character which advances the active position one character position on the same line. This character is also regarded as a nonprinting graphic. STX — Start of text — A transmission control character which precedes a text and which is used to terminate a heading. SUB — Substitute character — A control character used in the place of a character that has been found to be invalid or in error. SUB is intended to be introduced by automatic means. SYN — Synchronous idle — A transmission control character used by a synchronous transmission system in the absence of any other character (idle condition) to provide a signal from which synchronism may be achieved or retained between data terminal equipment. VT — Vertical tabulation — A format effector which advances the active position to the same character position on the next predetermined line. Part I Annex 10 — Aeronautical Communications I-8-31 22/11/07 Table 8-3. Conversion from the International Telegraph Alphabet No. 2 (ITA-2) to the International Alphabet No. 5 (IA-5) ITA-2 letter case of signal No. IA-5 column/row ITA-2 figure case of signal No. IA-5 column/row A 4/1 A – 2/13 – B 4/2 B ? 3/15 ? C 4/3 C : 3/10 : D 4/4 D 3/15 ? E 4/5 E 3/3 F 4/6 F 3/15 ? G 4/7 G 3/15 ? H 4/8 H 3/15 ? I 4/9 I 3/8 J 4/10 J 10 Attention Signal (Note 3) 0/7 Bel K 4/11 K ( 2/8 ( L 4/12 L ) 2/9 ) M 4/13 M . 2/14 . N 4/14 N , 2/12 , O 4/15 O 3/9 P 5/0 P 3/0 Q 5/1 Q 3/1 R 5/2 R 3/4 S 5/3 S ’ 2/7 ’ T 5/4 T 3/5 U 5/5 U 3/7 V 5/6 V = 3/13 = W 5/7 W 3/2 X 5/8 X / 2/15 / Y 5/9 Y 3/6 Z 5/10 Z + 2/11 + CR 0/13 CR CR 0/13 CR LF 0/10 LF LF 0/10 LF LTRS * LTRS * FIGS * FIGS * SP 2/0 SP SP 2/0 SP * * * No conversion shall be made for these positions and the signal/character shall be removed from the data. Note 1.— The end-of-message signal NNNN (in letter and figure case) shall convert to ETX (0/3). Note 2.— The start-of-message signal ZCZC (in letter and figure case) shall convert to SOH (0/1). Note 3.— Figures case of Signal No. 10 shall only be converted upon detection of the AFTN priority alarm which shall convert to five occurrences of BEL (0/7). Note 4.— When converting from ITA-2, a STX (0/2) character shall be inserted once at the beginning of the next line following detection of CR LF or LF CR at the end of the Origin Line. Note 5.— The sequence of seven signal 28 (LF) shall convert to one VT (0/11) character. Annex 10 — Aeronautical Communications Volume III 22/11/07 I-8-32 Table 8-4. Conversion from the International Alphabet No. 5 (IA-5) to the International Telegraph Alphabet No. 2 (ITA-2) Col. Row * Note 5 * * * * 31FL 32FL 32FL 16F 17F 23F 32F 31L 32L 16L 17L 18L 32F 31L 32L 16L 17L 18L Note 1 * * * * * 32FL 32FL 32FL 35F 18F 20F 33L 34L 35L 19L 20L 21L 33L 34L 35L 19L 20L 21L * Note 2 * * * * 32FL 19FL 11FL 25F 21F 39F 36L 37L 38L 22L 23L 24L 36L 37L 38L 22L 23L 24L * 28 FL Note 3 * * * 12FL 32FL 26FL 15F 33F 32F 39L 10L 11L 25L 26L 32F 39L 10L 11L 25L 26L 32F * 27FL * * * * * * 14FL 31FL 13FL 24FL 32F 22F 32F 32F 12L 13L 14L 15L 32F 32F 32F 32F 12L 13L 14L 15L 32F 32F 32F * * No conversion shall be made for these positions and the signal/character shall be removed from the data. Example: To find the ITA-2 signal to which the character 3/6 of IA-5 is to be converted, look at column 3, row 6. 25F means figure case of signal No. 25 (L = letter case, FL = either case designation). Note 1.— The character 0/3 (ETX) shall convert to the ITA-2 sequence signals 14L, 14L, 14L, 14L (NNNN). Note 2. — The signal 0/7 (BEL) shall only be converted when a sequence of 5 occurrences is detected, which shall convert to the ITA-2 sequence signals 30, 10F, 10F, 10F, 10F, 10F, 29. Note 3. — The character sequence CR CR LF VT (0/11) ETX (0/3) shall convert to the ITA-2 sequence signals 29, 27, 27, 28, 28, 28, 28, 28, 28, 28, 28, 14L, 14L, 14L, 14L. Note 4. — To prevent redundant generation of figure and letter characters in ITA-2 when converting from IA-5, no case designation shall be assigned to ITA-2 non-printing functions (signals No. 27, 28, 29, 30, 31). Note 5. — The character 0/1 (SOH) shall convert to the ITA-2 sequence signals 26L, 3L, 26L, 3L (ZCZC). Part I Annex 10 — Aeronautical Communications I-8-33 22/11/07 Table 8-5. Control field formats Control field bits Control field format for Information transfer (I frame) N(S) P N(R) Supervisory commands/responses (S frame) S S P/F N(R) Unnumbered commands/responses M M P/F M M M where: N(S) = send sequence count (bit 2 = low order bit) N(R) = receive sequence count (bit 6 = low order bit) S = supervisory function bits M = modifier function bits P = poll bit (in commands) F = final bit (in responses) Table 8-6. Commands and responses C field encoding Type Commands Responses Information transfer I (information) N(S) P N(R) Supervisory RR (receive ready) RR (receive ready) P/F N(R) RNR (receive not ready) RNR (receive not ready) P/F N(R) REJ (reject) REJ (reject) P/F N(R) Unnumbered DM (disconnected mode) P/F SABM (set asynchronous balanced mode) P DISC (disconnect) P UA (unnumbered acknowledgement) F FRMR (frame reject) F Annex 10 — Aeronautical Communications Volume III 22/11/07 I-8-34 FIGURES FOR CHAPTER 8 Figure 8-1. CIDIN protocol levels ENTRY CENTRE LEVEL LEVEL 3b LEVEL 3a LEVEL LEVEL 3b 3a EXIT CENTRE RELAY CENTRE PVC TRANSIT CENTRE CIDIN transport protocol CIDIN packet protocol X.25 packet protocol Data link protocol Physical interface Part I Annex 10 — Aeronautical Communications I-8-35 22/11/07 Figure 8-2. CIDIN terminology ___________________ Data link I-frame Link data field X.25 packet CIDIN packet ( 256 octets) ≤ CIDIN user data field Communications control field DLCF DLCF DATA LINK CNTL FIELD X.25 PACKET HEADER CIDIN PACKET HEADER CIDIN TRANSPORT HEADER CIDIN MESSAGE (OR SEGMENT) DATA LINK CNTL FIELD CIDIN TRANSPORT LEVEL CIDIN PACKET LEVEL X.25 PACKET LEVEL DATA LINK LEVEL ANNEX 10 — VOLUME III I-9-1 22/11/07 CHAPTER 9. AIRCRAFT ADDRESSING SYSTEM 9.1 The aircraft address shall be one of 16 777 214 twenty-four-bit aircraft addresses allocated by ICAO to the State of Registry or common mark registering authority and assigned as prescribed in the Appendix to this chapter. 9.1.1 Non-aircraft transponders that are installed on aerodrome surface vehicles, obstacles or fixed Mode S target detection devices for surveillance and/or radar monitoring purposes shall be assigned 24-bit aircraft addresses. Note.— Under such specific conditions, the term “aircraft” can be understood as “aircraft (or pseudo-aircraft) or vehicle (A/V)” where a limited set of data is generally sufficient for operational purposes. 9.1.1.1 Recommendation.— Mode S transponders used under specific conditions stated in 9.1.1 should not have any negative impact on the performance of existing ATS surveillance systems and ACAS. Annex 10 — Aeronautical Communications Volume III 22/11/07 I-9-2 APPENDIX TO CHAPTER 9. A WORLDWIDE SCHEME FOR THE ALLOCATION, ASSIGNMENT AND APPLICATION OF AIRCRAFT ADDRESSES

Source: https://magyarkozlony.hu/hivatalos-lapok/1f7c6b0e16b4b71a92e5ad24416008bbe2e26aab/dokumentumok/710811d1f7f958a2990684d0cbf918e84f5497e5/letoltes