1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Amendment 1 TERMINALS FOR TELEMATIC SERVICES T.432 (08/95) DOCUMENT TRANSFER AND MANIPULATION SERVICE DEFINITION (DTAM) - SERVICES AND PROTOCOLS - AMENDMENT I: REVISIONS OF T.432 TO SUPPORT G4 COLOUR AND FILE
2、 TRANSFER Amendment I to ITU-T Recommendation T.432 (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 questio
3、ns and issuing Recommen- dations on them with 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 Recomme
4、ndations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1 (Helsinki, March 1-12, 1993). Amendment 1 to ITU-T T.432, was prepared by ITU-T Study Group 8 (1993-1996) and was approved under the WTSC Resolution No
5、. 1 procedure on the 1 1 th of August 1995. 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 uti
6、lized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. STD-ITU-T RECNN T.432 AND L-ENGL 1995 qb2.591 Ub3b7Y9 775 m CONTENTS 1 Introduction 2 Modifications of Recommendation T.432 2.1 The following new subclause s
7、hould be added after 9.1.1.3.1.5 in Recommendation T.432 . 2.2 The following new subclause should replace 9.1 . 1 . 3.2 in Recommendation T.432 . 2.3 Insert new subclause 9.1.1.3.3 in Recommendation T.432 . 2.4 Table 5/T.432 should be replaced by the following new table 2.5 The following new subclau
8、se should be added after 9.5.1.1.1.5 in Recommendation T.432 . 2.6 The following new subclause should replace 9.5.1.1.2 in Recommendation T.432 . 2.7 Insert new subclause 9.5.1.1.3 2.8 Subclause 9.6.1.7 in Recommendation T.432 should be replaced by the following new subclause Page 1 1 1 1 1 2 2 2 3
9、3 Recommendation T.432 / Amd.1 (08/95) I STD-ITU-T RECMN T-432 AND L-ENGL 1775 48b259L Ob3b750 477 I SUMMARY Recommendation T.432 currently defines the document bulk transfer of Group 4 Telefax documents as the DTAM transparent mode and of arbitrary documents and binary files in the DTAM normal mode
10、. Amendment 1 provides for the transfer of binary files (based upon Recommendation T.434), and other formats, such as DTM, JPEG, EDIFACT and also Colour facsimile documents in the DTAM transparent mode. This amendment mainly concentrates on the amendments for the association establishment, where the
11、 relevant formats need to be recognized, and on the transfer phase, where segmenting must be extended to information that is not structured page by page. II Recommendation T.432 / Amd.1 (08/95) Amendment 1 to Recommendation T.432 REVISIONS OF T.432 TO SUPPORT G4 COLOUR AND FILE TRANSFER (Geneva, 199
12、5) 1 Introduction This amendment contains the revision of existing Recommendations T.432 in order to support colour and file transfer extension for G4 facsimile application. 2 Modifications of Recommendation T.432 2.1 The following new subclause should be added after 9.1.1.3.1.5 in Recommendation T.
13、432 9.1.1.3.1.6 Additional document characteristics This parameter specifies the additional document characteristics available to the sender of this parameter as receiving capabilities. In DTAM transparent mode, this parameter is specially used to indicate capability of G4 facsimile machine to handl
14、e colour. The attributes and values that may be specified by this parameter are restricted to those, permitted by the corresponding document application profile. The parameter may be present in both the normal and the Transparent Mode. The values of this parameter are as described in Recommendation
15、T.414 2.2 The following new subclause should replace 9.1.1.3.2 in Recommendation T.432 9.1.1.3.2 File transfer capabilities This parameter specifies file transfer capabilities which are available to the sender of this parameter as receiving capabilities. The parameter is present in both the normal a
16、nd the Transparent Mode. This parameter may have one of the following values. - FT (Binavy File Transfer) capabilities This parameter indicates the capability to receive files encoded to the specification of Recommen- dation T.434. - Transparent data capabilities This parameter indicates that the se
17、nder is ready to accept (when acting as a receiver) data that are transferred completely transparently. DTM (Document Transfer Mode) capabilities This parameter indicates the capability to receive BFT files (defined in Recommendation T.434) encoded to the DTM coding rules defined in Recommendation T
18、.563. - - EDIFACT capabilities This parameter indicates the capability to receive files encoded to the EDIFACT formats defined in lSO/lEC 9735. 2.3 Insert new subclause 9.1.1.3.3 in Recommendation T.432 9.1.1.3.3 Private capabilities This parameter indicates capabilities for private values. DTAM-PM
19、does not care about the contents of this parameter. This parameter is only present in the Transparent Mode. Recommendation T.432 / Amd.1 (08/95) I - STD.ITU-T RECMN T.432 AND 1-ENGL 1795 m 48b2571 Ob3b752 2bT 2.4 Table 5T.432 should be replaced by the following new table TABLE YT.432 D-CAPABILITY se
20、rvice parameters Parameter Application Capabilities ODA Application Capabilities Document Application Profile * Document Architecture Class Non-Basic Document Characteristics Non-Basic Structural Characteristics Operational application profile Additional Document Characteristics File Transfer Capabi
21、lities * Private Capabilities Capability result User information D-CAPABILITY request * NOTE - The meaning of the characters in the table is given in clause 4. This parameter is absent in the Transparent Mode This parameter is only present in the Transparent Mode D-CAPABILITY indication D-CAPABILITY
22、 response U U U U U U U U M U D-CAPABILITY confirmation 2.5 The following new subclause should be added after 9.5.1.1.1.5 in Recommendation T.432 9.5. i. 1.1.6 Additional document characteristics This parameter specifies the additional document characteristics available to the sender of this paramet
23、er as receiving capabilities. The attributes and values that may be specified by this parameter are restricted to those that are permitted by the corresponding document application profile. The values of this parameter are as described in Recommendation T.414. 2.6 The following new subclause should
24、replace 9.5.1.1.2 in Recommendation T.432 9.5.1.1.2 File transfer capabilities This parameter specifies file transfer capabilities which are available to the sender of this parameter as receiving capabilities. The parameter is present in both the Normal Mode and the Transparent Mode. The values of t
25、his parameter may be one of the following: - BFT (Binary File Transfer) capabilities This value indicates the capability to receive files encoded to the specification of Recommendation T.434. - Transparent data capabilities This value indicates that the sender is ready to accept (when acting as a re
26、ceiver) data that are transferred completely transparently. 2 Recommendation T.432 / Amd.1 (08195) - DTM (Document Transfer Mode) capabilities This value indicates the capability to receive BFT files (defined in Recommendation T.434) encoded to the DTM encoding rules defined in Recommendation T.563.
27、 - EDIFACT capabilities This value indicates the capability to receive files encoded to the EDIFACT formats defined in ISOIEC 9735. 2.7 Insert new subclause 9.5.1.1.3 9.5.1.1.3 Private capabilities This value indicates capabilities for private values. DTAM-PM does not care about the contents of this
28、 parameter. This value may be used in the Transparent Mode. 2.8 Subclause 9.6.1.7 in Recommendation T.432 should be replaced by the following new subclause 9.6.1.7 Checkpoint value Under the DTAM Transparent Mode, the places to insert the checkpoints are related to a number of IDEs indicated by the
29、DTAM user. A checkpoint should be set at the end of each segment and a segment should be composed of the number of integral IDEs which is indicated by the user. Only the number of IDEs of the last segment is equal or inferior to the indicated number. In this case, this parameter specifies the number
30、 of IDEs that compose a segment. NOTE 1 - Some applications may not count IDEs of Document Profile and Document Root. if one of the different types of file transfer is carried out under DTAM Transparent Mode, the places to insert the checkpoints are related to a certain segment size indicated by the
31、 DTAM user. A checkpoint should be set at the end of each segment and a segment should be composed of a small amount of data which size is indicated by the user. This parameter specifies the size of the segment. The value of this parameter is an integer superior to zero, and means a multiple of 1024
32、 octets. A value of zero indicates that checkpoint will not be used. If this parameter is absent, Checkpoint Value zero is assumed. NOTE 2 - Only the size of last segment may be equal or inferior to the indicated segment size. NOTE 3 - As an example, value 2 means 2048 octets. Recommendation T.432 / Amd.1 (0895) 3
