ITU-T Q 1152-1993 Procedures for Interworking between INMARSAT Aeronautical Mobile Satellite System and the International Public Switched Telephone Network ISDN - Interworking with pp《.pdf

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1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU INTERWOR KI NG WITH SATELLITE MOBILE SYSTEMS Q.1152 (03/93) PROCEDURES FOR INTERWORKING BETWEEN INMARSAT AERONAUTICAL MOBILE SATELLITE SYSTEM AND THE INTERNATIONAL PUBLIC SWITCHED TELEPHONE NETWORWISDN ITU-T

2、Recommendation Q.1152 (Previously “CCITT Recommendation”) ITU-T RECMN*Q.L35Z 93 4862593 O586396 50T = FOREWORD The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of the International Telecom- munication Union. The ITU-T is responsible for studying technical, operating and

3、tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, established the topics for study by the ITU-T Study Groups which, in their turn, pro

4、duce Recommendations on these topics. ITU-T Recommendation Q.1152 was revised by the ITU-T Study Group XI (1988-1993) and was approved by the WTSC (Helsinki, March 1-12, 1993). NOTES 1 As a consequence of a reform process within the International Telecommunication Union (ITU), the CCITT ceased to ex

5、ist as of 28 February 1993. In its place, the ITU Telecommunication Standardization Sector (ITU-T) was created as of 1 March 1993. Similarly, in this reform process, the CCIR and the IFRI3 have been replaced by the Radiocommunication Sector. In order not to delay publication of this Recommendation,

6、no change has been made in the text to references containing the acronyms “CCITT, CCIR or IFRB” or their associated entities such as Plenary Assembly, Secretariat, etc. Future editions of this Recommendation will contain the proper terminology related to the new ITU structure. 2 telecommunication ad

7、ministration and a recognized operating agency. In this Recommendation, the expression “Administration” is used for conciseness to indicate both a O ITU 1994 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, includin

8、g photocopying and microfilm, without permission in writing from the ITU. 1 2 3 4 5 6 7 8 9 10 11 CONTENTS Introduction Conversion of information elements 2.1 Signalling System R2 . 2.2 Signalling System No . 7 (Tup) 2.3 Signalling System No . 5 . Incoming INMARSAT aeronautical logic procedures (air

9、-to-ground calls) Outgoing INMARSAT aeronautical logic procedures (ground-to-air calls) Interworking of INMARSAT aeronautical signalling system with itself . Interworking of incoming INMARSAT aeronautical to Signalling System R2 Interworking of Signalling System R2 to outgoing INMARSAT aeronautical

10、. Interworking of incoming INMARSAT aeronautical to Signalling System No . 7 (TUP) . Interworking of Signalling System No . 7 (Tup) to outgoing INMARSAT aeronautical Interworking of incoming INMARSAT aeronautical to Signalling System No . 5 Interworking of Signalling System No . 5 to outgoing INMARS

11、AT aeronautical . Page 1 1 1 4 6 6 16 21 23 26 29 29 35 35 Recommendation Q.1152 (03/93) i ITU-hT RECMN*Q*LL52 93 48b259L 0586398 382 m Recommendation Q.1152 PROCEDURES FOR INTERWORKING BETWEEN INMARSAT AERONAUTICAL MOBILE SATELLITE SYSTEM AND THE INTERNATIONAL PUBLIC SWITCHED TELEPHONE NETWORKISDN

12、(Melbourne, 1988; modified at Helsinki, 1993) 1 Introduction This Recommendation provides the detailed procedures for interworking between the INMARSAT aeronautical system and signalling systems of the public fixed network. For a brief description of the INMARSAT aeronautical system, see Appendix YQ

13、. 1 15 1. 2 Conversion of information elements Tables 1 and 2 list the signals of the INMARSAT aeronautical system that are relevant for the purpose of interworking with the PSTNASDN. The forward interworking telephone events (FITES) and backward interworking telephone events (BITES), as defined in

14、Annex NQ.601-4.608, that correspond to each of these signals is also provided in the tables. TABLE VQ.1152 INMARSAT aeronautical - forward signais FITE No. Ground-to-air calls 1 17 22 Air-to-ground calls 17 18 1 1 22 Message: information element: value Call announcement: AES id called terminai Call

15、announcement: service: telephone Channel release: Cause: Normal clearing Access request: message type: publidcrew voice Access request: message type: crew distress voice Access request: address digits O, 1 Cali information: address digits 2 . 17 Channel release: Cause: Normal clearing NOTE - Signals

16、 required for interworking with Signalling System No. 7 (ISUP) are for further study. Tables 3 to 18 give the relationship between signals of the fixed network signalling systems and the INMARSAT aeronautical system. 2.1 Signalling System R2 2.1.1 Table 3 gives the relationship between messages in t

17、he INMARSAT aeronautical signalling system and forward signals in Signalling System R2 for air-to-ground calls, i.e. interworking of INMARSAT aeronautical to Signalling System R2. Table 4 shows the relationship between forward signals in Signalling System R2 and messages in the INMARSAT aeronautical

18、 signalling system for ground-to-air calk In the comment column actions taken by the MSSC are indicated, Recommendation Q.1152 (03D3) 1 ITU-T RECflN*Q.L152 93 = 48b259L 0586377 217 in particular for signals of R2 which have no equivalent message in the INMARSAT aeronautical system. INMARS AT aeronau

19、tical signalling system Message: information element: value The signai numbers for forward signais of Signalling System R2 are those given in Table A.7/Q.601-Q.608. Signal No. Signalling System R2 Signal name: information element TABLE 2/Q. 1 152 INMARSAT aeronautical - backward signals BITE No. Gro

20、und-to-air-calls 5 22 29 16 12 17 Air-to-ground-calls 22 2 29 20 16 15 17 12 14 Message: information element: value Test Connect Channel release: Cause: Normal clearing Call attempt result: Cause: User busy Call attempt result: Cause: No channel available Call attempt result: Cause: Destination out

21、of servi Connect Call attempt result: Address complete Channel release: Cause: Normal clearing Channel release: Cause: Unspecified Channel release: Cause: User busy Channel release: Cause: Unassigned number Channel release: Cause: Destination out of service Channel release: Cause: No channel availab

22、le Channel release: Cause: Invalid number format NOTE - Signals required for interworking with Signalling System No. 7 (ISUP) are for further study. TABLE 3/Q. 1 152 Conversion of forward signals in the INMARSAT aeronautical signalling system to Signalling System R2 Air-to-ground calls Access reques

23、t: message type - public voice - crew voice - crew distress voice Access request: address digits O, 1 Call information: digits 2 to 17 Test Channel release: Cause: Normal clearing Calling partys category - subscriber/operator without forward transfer facility - subscribedoperator without forward tra

24、nsfer facility - subscribedwith priority Country code indicator (echo suppressor controls) Address signalslfirst digit Not applicable Clear forward 12 12 14 10 1 16 NOTE - Signai No. 21, nature of circuit indicator: one satellite circuit in the connection, is generated by the MSSC, if required. 2 Re

25、commendation Q. 1152 (03/93) ITU-T RECMN*QLLSZ 93 m 4862.591 0586400 Ab0 m Signal No. 1 2-6 7 8 9 10,ll 12 13 14 15 16 17 18 19 20 21 TABLE 4/Q. 1 152 Conversion of forward signais in Signailing System R2 to INMARSAT aeronautical signaiiing system Ground-to-air dis Signalling System R2 Signal name A

26、ddress signals Language digit: 1-1, . 5 Discriminating digit Country code indicator, outgoing half suppressor required Country code indicator, no echo suppressor required Country code indicator, incoming half echo suppressor required Calling partys category, subscriber or operator without forward tr

27、ansfer facility Calling partys category, data transmission control Calling partys category, subscriber with priority Calling partys category, operator with forward transfer capability Clear forward Forward transfer First digit: I-l,1-2 . 1-10 Reply to A-14: 1-1 . 1-10 Reply to first A-13; 1-13 Reply

28、 to first A-13; 1-14 INMARS AT aeronautical signalling system Message: information element: value Call announcement: AES identity, called terminal Call announcement - service: telephone Call announcement - service: telephone, priority for further study Call announcement - service: telephone Channel

29、release: Cause: Normal clearing Comments Interpreted by MSSC interpreted by MSSC MSSC will insert echo control ievice if needed interpreted by MSSC nterpreted by MSSC Not applicable Not applicable Interpreted by MSSC Not applicable Not applicable Not applicable 2.1.2 Table 5 gives the relationship b

30、etween messages in the INMARSAT aeronautical signalling system and backward signals in Signailing System R2 for ground-to-air calls, Le. interworking of Signalling System R2 to ENMARS AT aeronautical. Backward signals in Signalling System R2 generated by the MSSC for unsuccessful ground-to-air calls

31、 are given in Table 5 bis. These signals are not related to any specific message received from the aircraft earth station. Recommendation Q.1152 (03/93) 3 ITU-T RECMN*Q.1152 73 4862571 0586401 ?T? Signalling System R2 Signal name: information element I INMARS AT aeronautical signalling system I Even

32、t in INMARSAT system TABLE 5lQ. 1 152 Signal No. Conversion of backward signais in the INMARSAT aeronautical signalling system to Signalling System R2 Ground-to.air-calls INMARSAT aeronautical signalling system Message: information element: value Test Connect Channel release: Cause: Normal clearing

33、Call attempt result: Cause: - userbusy - no channel available - destination out of service - others Signalling System R2 Signal name: information element International, subscriber line free, charge Answer signai Clear back Subscriber line busy Congestion on the national network Subscriber line out o

34、f order International; send special info tone Signal No. 13 11 12 5 1 10 14 TABLE 5 bislQ. 1 152 Unsuccesssful call events and backward signals in Signalling System R2 Ground-to-air-cails I Congestion in MSSC Incomplete AES number Continuity test failure AES barred for incoming access Called AES not

35、 logged on No satellite channel frequency/equipment B4 - Congestion B5 - Unallocated number B8 - Subscriber line out of order B2 - Send special info tone B2 - Send special info tone B4 - Congestion Table 6 gives the relationship between backward signals in Signalling System R2 and messages in the IN

36、MARSAT aeronautical signalling system for air-to-ground calls, i.e. interworking of INMARSAT aeronautical to Signalling System R2. The comments column indicates specific actions taken by the MSSC. The signal number of backward signals of Signalling System R2 are those given in Table A.ll/Q.601-Q.608

37、. 2.2 Signalling System No. 7 (TUP) 2.2.1 No. 7 (Tup). Tables 7 and 8 are similar to Tables 3 and 4, respectively, and apply to forward signais in Signalling System The signal numbers for forward signals of Signalling System No. 7 (TP) are those given in Table AS bislQ.601- 4.608. 4 Recommendation Q

38、.1152 (03/93) ligna1 No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 TABLE 6/Q. 1 152 Conversion of backward signais in Signaiiiig System R2 to INMARSAT aeronautical signalling system Air-to-ground calls Signalling System R2 Signal name A4 - Congestion on the national network A6 - Address complete, charge,

39、set up, speech condition exchange or at its output A15 - Congestion in an international B2 - Send special information tone B3 - Subscriber line busy B4 - Congestion B5 - Unallocated number B6 - Subscriber line free, charge B7 - Subscriber line free, no charge B8 - Subscriber line out of order Answer

40、 Clear back Bl-B6 - International, subscriber line free, charge B9, B 10 - International, send special information tone Bll-Bl5- Congestion INMARS AT aeronautical signalling system Message: information element: value :hanne1 release: Ia11 attempt ,esult: Ihannel release: zhannel release: Zhannel rel

41、ease: Zhannel release: Zhannel release: Call attempt result: Call attempt result: Channel release: Connect Channel release: Call attempt result: Channel release: Channel release: remote public network, switching equipment congestion address complete international network, switching equipment congest

42、ion remote public network, normal - unspecified remote public network, user busy remote public network, switching equipment congestion remote public network, unassigned number address complete address complete remote public network, destination out of service Cause: Normal clearing address complete

43、international network, normal - unspecified remote public network, switching equipment congestion Comments go-charge infoi nation, used by vSSC only Ilearback upervision ione by MSSC 2.2.2 Signalling System No. 7 (TUP). Tables 9, 9 bis and 10 are similar to Tables 5, 5 bis and 6, respectively, and a

44、pply to backward signals in , The signal numbers for backward signals in Signalling System No. 7 (TUP) are those given in Table A.9 bidQ.601- 4.608. Recommendation Q.1152 (03/93) 5 ITU-T RECMN*Q*LL52 93 48b259L 0586403 57T W TABLE 7/Q. 1 152 Conversion of forward signals in INMARSAT aeronautical sig

45、nalling system to Signalling System No. 7 Air-to-ground calls INMARSAT aeronautical signalling system Message: information element: value Access request: message type Public voice/ Crew voicel Crew distress voicel Access request: address digits O, 1 Call information: digit 2 to 17 Test Channel relea

46、se: Cause: Normal clearing Signalling System No. 7 Signal name: information element Calling partys category indicator: Ordinary subscriber/ Ordinary subscribed Subscriber with priority Address signals: Digit 1, 2 . O nature of address indicator. international number Continuity check performed on pre

47、vious circuit Clear forward signal NOTE - Signal No. 5, nature of circuit indicator, one satellite in connection, is generated by the MSSC. Signai No. 13 13 13 14 1 3 22 16 2.3 Signalling System No. 5 2.3.1 System No. 5. Tables 11 and 12 are similar to Tables 3 and 4, respectively, and apply to forw

48、ard signals in Signalling The signal numbers for forward signals of Signalling System No. 5 are those given in Table A.4/Q.601-Q.608. 2.3.2 Signalling System No. 5. Tables 13, 13 bis and 14 are similar to Tables 5, 5 bis and 6, respectively, and apply to backward signals in The signal numbers for ba

49、ckward signals in Signalling System No. 5 are those given in Table A.8/Q.601-Q.608. 2.4 the INMARSAT aeronautical signalling system is for further study. The relationship between forward and backward signals of Signalling System No. 7 (ISUP) and messages of 3 Incoming INMARS AT aeronautical logic procedures (air-to-ground calls) Figure 1 contains the procedures for the incoming INMARSAT aeronautical signalling system. This description only includes those aspects of the INMARSAT aeronautical system which have to be implemented for interworking purposes. Internal