ITU-T T 611-1994 Programming Communication Interface (PCI) APPLI COM for Facsimile Group 3 Facsimile Group 4 Teletex Telex E-Mail and File Transfer Services - Terminals for Telemat.pdf

1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU T.611 (77 /94) TERMINALS FOR TELEMATIC SERVICES PROGRAMMING COMMUNICATION INTERFACE (PCI) APPLUCOM FOR FACSIMILE GROUP 3, FACSIMILE GROUP 4, TRANSFER SERVICES TELETEX, TELEX, E-MAIL AND FILE ITU-T Recommendat

2、ion T.611 (Previously “CCITT Recommendation”) FOREWORD The ITU-T (Telecommunication Standardization Sector) is a permanent organ of the International Telecommunication Union (ITU). The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommen- dations on them w

3、ith a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, establishes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of

4、Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. i (Helsinki, March 1-12, 1993). ITU-T Recommendation T.611 was revised by ITU-T Study Group 8 (1993-1996) and was approved under the WTSC Resolution No. 1 procedure on the 1 lth of November 1994.

5、 NOTE In this Recommendation, the expression “Administration” is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. O ITU 1995 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electron

6、ic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. CONTENTS Page 1 PART I . GENERAL DESCRIPTION . Scope Definitions and References 2.1 Interface Definitions . 2.2 File Definitions . 2.3 References . 2.5 Operating Systems 2.6 Trade Marks Structure of t

7、his Recommendation . 3.1 Extensions to this Recommendation . General Principies 4.1 Model 4.2 Information Exchange 4.3 Interface Configuration Environment (ICE) . 4.4 Submission Principie Functional Behaviour . 5.1 Functional Classes and Service Profiles . 5.2 Error Handling 5.3 Multiple LAS and mul

8、tiple CAS 5.4 Identification Means . 5.5 Dispatch Received Files Facility (DRF) . 5.6 Communications Control - CA-Record Task Data Descriptions (TDDs) . 6.1 Generic TDD Presentation 6.2 Description of TDD Elements 6.3 Code-ID 6.4 Text Based Encoding 6.6 TDD Functionality Exchange Method . 7.1 Overvi

9、ew of Basic Exchange Method Functions 7.2 Basic Exchange Method Functions . 7.3 Implementation of Basic Exchange Method Functions Transfer Formats 8.1 APPLVCOM Transfer Formats: Extended and Standard ASCII 8.2 APPLVCOM Transfer Format: T.61 8.3 APPLVCOM Transfer Format: TIFF 8.4 Service Constraints

10、applying to Transfer Formats ICE . 9.1 Presentation of the ICE . 9.2 Gaining access to the ICE Information . 9.3 Master ICE 9.5 CA-Descriptor Components . 2.4 Abbreviations and Acronyms . 6.5 Handling of Documents 9.4 CA-Descriptor . Recommendation T.611 (11194) 1 1 1 2 3 4 6 6 6 7 7 7 8 10 11 11 11

11、 12 13 13 15 15 23 23 25 25 25 35 36 55 55 58 68 70 72 73 73 82 83 85 85 85 86 86 I ITU-T RECMN+T.bLL 74 48b259L 0599835 595 1 O Functional Classes and Profiles 10 .i Functional Class A 10.2 Functional Class B 10.3 Additional Functions PART II - SERVICE DEPENDENCIES Service: Telefax Group 3 . Servic

12、e Specific Syntax Elements 11.2 Text Based Encoding 10.4 Service Profiles . 1 1 1 1.1 1 1.3 Additional Functionality . 1 1.4 CA-Descriptor Settings . 12 Service: Telefax Group 4 . 12.1 Service Specific Syntax Elements 12.2 Text Based Encoding 12.3 Additional Functionality . 12.4 CA-Descriptor Settin

13、gs . 13 Service: Teletex 13.1 Service Specific Syntax Elements 13.2 Text Based Encoding 13.3 Additional Functionality . 13.4 CA-Descriptor Settings . 14 Service: Telex via Teletex 14.1 Service Specific Syntax Elements 14.2 Text Based Encoding 14.3 Additional Functionality . 14.4 CA-Descriptor Settin

14、gs . 15 Service: Telex . 15.1 15.2 Text Based Encoding 15.3 Additional Functionality . Service Specific Syntax Elements 15.4 CA-Descriptor Settings . 16 Service: E-Mail Service Specific Syntax Elements 16.1 16.2 Text Based Encoding 16.3 Interpersonal Messaging . 16.4 Interpersonal Notification . 16.

15、5 Delivery Report 16.6 Mapping of MHS service elements 16.7 E-Mail Profiles 16.8 CA-Descriptor Settings . Service Specific Syntax Elements 17.2 Text Based Encoding 17.3 Additional Functionality . . 17.4 CA-Descriptor Settings . . 17 Service: File Transfer . 17.1 Page 88 88 88 90 90 91 91 91 91 97 10

16、0 102 102 103 107 107 107 107 112 115 118 119 119 120 122 123 125 125 125 127 130 131 132 133 142 153 154 156 158 159 159 163 164 167 169 11 Recommendation T.611 (11/94) ITU-T RECMNxTmbLL 94 4662591 0599836 421 PART III . BINARY ENCODING SCHEME 18 Generic C description . 18.1 Binary encoding of TDDs

17、 . 19 Implementation Dependencies . Mapping of Binary Coded TDD Data Types 19.2 Default Exchange Method Implementation of Primitive Exchange Method . Annex A - Syntax for Presentation and Encoding A.l BNF-style Syntax PART IV - PLATFORM DEPENDENCIES 19.1 19.3 A.2 C-Language Notation Annex B - Locati

18、on of the ICE . Annex C - List of APPLVCOM Error Codes Annex D - Examples of TTD Exchanges . A Sample Send Session A Sample Receive Session . A Sample Trace Session . Annex E - Example of Interface Configuration Environment (ICE) Annex F - Exchange Method of 1992 Version . Exchange Method Functions

19、of 1992 version Annex G - Service Specific Information G . I Call Identification Line of the Telefax G4 and Teletex Service . G.2 Terminal ID Annex H - Summary of Transfer and Transmission Formats . Transfer Formats related to Transmission Formats Transmission Formats related to Service D.l D.2 D.3

20、F . 1 H . i H.2 Recommendation T.611 (11/94) - Page 170 170 170 194 194 194 194 195 204 204 205 205 207 209 209 210 212 214 216 216 222 222 222 223 223 223 iii ITU-T RECIN*T.bLL 74 W 4862573 0599817 3bA W SUMMARY This Recommendation as approved in 1992 defines a Programming Communication Interface c

21、alled “APPLUCOM, providing unified access to Telefax Group 3, Telefax Group 4, telex and teletex services. Recommendation T.611 has been revised for clarity and to include E-mail services in general, Message Handling Systems (MHS), as described in the IT-T XAOO-series of Recommendations, in particul

22、ar and File Transfer Services. Special consideration has been taken to assure backwards compatibility with the 1992 version of this Recommendation. iv Recommendation T.611 (11/94) Recommendation T.611 PROGRAMMING COMMUNICATION INTERFACE (PCI) APPLUCOM FOR FACSIMILE GROUP 3, FACSIMILE GROUP 4, TELETE

23、X, TELEX, E-MAIL AND FILE TRANSFER SERVICES (revised 1994) PART I - GENERAL DESCRIPTION 1 Scope This Recommendation defines the Programming Communication Interface (PCI) called “APPLUCOM The general concepts of PCIs are defined in the ITU-T Recommendation F.581 (1992). This PCI provides unified acce

24、ss to different communications services, such as telefax group 3 or other telematic services. This Recommendation currently specifies the access to the following telematic services: - Telefax group 3; - Telefax group 4; - Teletex; - Telex); - E-Mail services; - File transfer services. The principle

25、of this interface is to exchange messages between two entities (i.e. the Local Application and the Communication Application). This Recommendation describes the structure, contents of those messages and the way to exchange them. Two message encoding schemes are defined: text based and binary structu

26、red. Implementing this PCI is not required to participate in a telematic service. However, use of this interface will provide binary compatibility between the above mentioned entities. As a result end-users will benefit from plug-in compatibility between products coming from different manufacturers.

27、 This Recommendation provides a framework for future extensions that keep functionalities consistent and upward compatible. To summarize, this Recommendation forms a high level API (Application Programming Interface) which shields all telecommunication peculiarities but gives powerful control and mo

28、nitoring on the telecommunication activity to the application designers. 2 Definitions and References 2.1 Interface Definitions The following definitions apply to the interface. 2.1.1 communication application (CA); A Communication Application (CA) is provided by hardware and/or software allowing to

29、 participate in standardized telecommunications services. The telecommunications services supported by this Recommendation are listed in clause 1. I) The access to the telex service does not include the dialogue facility. Recommendation T.611 (11/94) 1 ITU-T RECflN*T.bLL 74 = 48b257L 0577837 330 2.1

30、.2 local application (LA): A Local Application (LA) is an application able to generate files or documents and possibly able to manage communications dialogues. Such LAS can be word processors, spread sheets, graphic editors, file editors, etc. The LA shall generate messages conforming to this Recomm

31、endation. 2.1.3 task data description (TDD): A Task Data Description (TDD) describes the structure of the messages exchanged between a LA and a CA (not the way to effectively exchange them). A Request TDD describes an exchange originated by a LA towards a CA. A Response TDD describes an exchange ori

32、ginated by a CA towards a LA. 2.1.4 exchange method (EM): The Exchange Method (EM) describes how the TDDs are exchanged between a CA and a LA. This Recommendation defines a generic Exchange Method which shall be adapted to the target operating system by the means described in this Recommendation. Lo

33、cal area and wide area network environments are supported by the generic Exchange Method. 2.1.5 CA-descriptor: The CA-Descriptor is a collection of information concerning the use of a CA. The CA-Descriptor describes the facilities and features of a given CA so that any LA that uses that CA knows how

34、 to proceed. The CA-Descriptor is a component of the Interface Configuration Environment (ICE). 2.1.6 interface configuration environment (ICE): The Interface Configuration Environment (ICE) is composed of the Master ICE and related CA-Descriptors. The Master ICE lists all CAS that can be reached fr

35、om within a given LA. The aim of the ICE is to assist the LA in the selection of an appropriate CA with respect to the LA requirements. 2.2 File Definitions This Recommendation deals with various kind of files: those interchanged between a LA and a CA and those exchanged through a telecommunications

36、 network. The following definitions are used throughout the body of this Recommendation. 2.2.1 format of these files (Transfer Format) is further defined in this Recommendation. transfer files: As shown in Figure 1 the Transfer Files are those files exchanged between a LA and a CA. The Transfer file

37、s Outgoing file Transmission files Transmitted file Incoming file Received file FIGURE 1.611 The distinct types of files defined by APPLYCOM Telecommunications T0823360-95/601 2 Recommendation T.611 (11/94) ITU-T RECMN*T-bItIt 94 m 4862593 0599820 952 m 2.2.1.1 through a telecommunications network.

38、The format of the file is from one of the possible Transfer Formats. outgoing file: The Outgoing File is a file that the LA transmits to the CA in order to be transmitted by the CA 2.2.1.2 received from the network. The format of the file is from one of the possible Transfer Formats. incoming file:

39、The Incoming File is a file transmitted to the LA by the CA. It generally corresponds to files 2.2.1.3 transfer format: The Transfer Format defines the structure of the Transfer Files. Depending on the telecommunication services used, some Transfer Formats are more suitable than others. The possible

40、 Transfer Formats are defined in clause 8. A Transfer Format is identified by the Convert-ID. The identification and selection of a Transfer Format is further described in 5.4.5. 2.2.2 this. The format of these files, the Transmission Format, is defined intrinsically by the telecommunications servic

41、e used. transmission files: The Transmission Files are files exchanged by a CA through the network. Figure 1 depicts 2.2.2.1 format suitable for exchange by the protocol used in the telecommunications service. transmitted file: The Transmitted File is a file sent by the CA across a telecommunication

42、s network in a 2.2.2.2 telecommunications network in the format used for exchange by the protocol used in the telecommunications service. received file: The Received File is a file built by the CA from information received through the 2.2.2.3 the telecommunications service used. The Transmission For

43、mat is identified by the Type-ID (see 5.4.6). transmission format: The Transmission Format defines the structure of the Transmission Files depending on 2.3 References This Recommendation refers to the following ITU-T Recommendations: - Recommendation F.59, General characteristics of the internationa

44、l telex service. - Recommendation F.60, Operational provisions for the international telex service. - Recommendation F. 160, General operational provisions for the international public facsimile services. - Recommendation F. 184, Operational provisions for international facsimile service between sub

45、scriber stations with group 4 machines (telefm group 4). - Recommendation F. 200, Teletex Service. - Recommendation F. 58 1, Service Recommendation for Programming Communication Intelfaces. - Recommendation S. 1. International telegraph alphabet No. 2. - Recommendation T.4, Standardization of group

46、3 facsimile apparatus for document transmission. - Recommendation T.6, Facsimile coding schemes and coding control functions for group 4 facsimile apparatus. - Recommendation T.30, Procedures for document facsimile transmission in the general switched telephone network. - Recommendation T.35, Proced

47、ure for the allocation of ITU members codes. - Recommendation T.50, International Reference Alphabet. - Recommendation T.5 1. Latin Alphabet coded character sets for Telematic services. - Recommendation T.52, Non-Latin coded character sets for Telematic services. - Recommendation T.61, Character rep

48、ertoire and coded character sets for the international Teletex service. NOTE - Recommendation T.6 i has been superseeded by Recommendation T.50-Series since 1993. Recommendation T.611 (1l94) 3 ITU-T RECMNUTmbLZ 74 m 48b257L 0579823 897 - - Recommendation T.62, Control procedures for Teletex and grou

49、p 4 facsimile services. Recommendation T.434, Specijcation of Binary File Transfer (BFT). Recommendation T.500, General overview of the T.500-Series of Recommendations. Recommendation T.563, Terminal characteristics for group 4 facsimile apparatus. Recommendation T.57 1, Terminal characteristics for the Telematic File Transfer within the facsimile group 4 and teletex apparatus. - - - - Recommendation X.208, Specifcation of Abstract Syntax Notation one (ASN. I). - Recommendation X.209, Specifcation of Basic Encoding Rules for Abstract Syntax Notation on