1、INTERNATIONAL TELECOMMUN KATION UNION ITU-T TELECOMMUNICATION STAN DAR DIZATION SECTOR OF ITU F.185 (06198) SERIES F: NON-TELEPHONE TELECOMMUNICATION SERVICES Telematic services - Public facsimile service Internet facsimile: Guidelines for the support of the communication of facsimile documents ITU-
2、T Recommendation F.185 (Previously CCITT Recommendation) S3-ITU-T RECMN F-LB5-ENGL 1994 m Y862531 Ob5321b BY9 m ITU-T F-SERIES RECOMMENDATIONS NON-TELEPHONE TELECOMMUNICATION SERVICES TELEGRAPH SERVICE Operating methods for the international public telegram service The gentex network Message switchi
3、ng The international telemessage service The international telex service Statistics and publications on international telegraph services Scheduled and leased communication services Phototelegraph service MOBILE SERVICE Mobile services and multidestination satellite services II TELEMATIC SERVICES F.l
4、-F.19 F.20-F.29 F.30-F.39 F.40-F.58 F.59-F.89 F.90-F.99 F. 1 OO-F. 1 O4 F. 105-F. 109 F. 1 10-F. 159 11 Public facsimile service F.160-F.199 Teletex service Videotex service General provisions for telematic services I MESSAGE HANDLING SERVICES DIRECTORY SERVICES DOCUMENT COMMUNICATION Document commu
5、nication Programming communication interfaces DATA TRANSMISSION SERVICES AUDIOVISUAL SERVICES ISDN SERVICES UNIVERSAL PERSONAL TELECOMMUNICATION F.200-F.299 F.300-F.349 F.350-F.399 F.400-F.499 F.500-F.549 F.550-F.579 F.580-F.599 F.600-F.699 F.700-F.799 F.800-F.849 F.850-F.899 HUMAN FACTORS F.900-F.9
6、99 For further details, please refer IO ITU-T List of Recommendations. STD-ITU-T RECVN F-LBS-ENGL 1998 m 4862591 Ob53217 785 m ITU-T RECOMMENDATION F.185 INTERNET FACSIMILE: GUIDELINES FOR THE SUPPORT OF THE COMMUNICATION OF FACSIMILE DOCUMENTS Summary This Recommendation describes the guidelines fo
7、r the support of the communication of facsimile documents (both Group 3 and Group 4) via the Internet in real-time or store-and-forward mode. NOTE - Support for Group 4 is for further study. Source ITU-T Recommendation F.185 was prepared by ITU-T Study Group 8 (1997-2OOO) and was approved under the
8、WTSC Resolution No. 1 procedure on the 18th of June 1998. Recommendation F.185 (06/98) 1 FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommuni- cations. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ o
9、f the ITU. The ITU-T is responsible for studying technical, operating and 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, establishe
10、s the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations 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. In some areas of information technology which fall within ITU-Ts
11、 purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS The ITU d
12、raws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU mem
13、bers or others outside of the Recommendation development process. As of the date of approval of this Recommendation, the ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this m
14、ay not represent the latest information and are therefore strongly urged to consult the TSB patent database. O ITU 1998 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without
15、permission in writing from the ITU. 11 Recommendation F.185 (06/98) 1 2 3 4 5 STD-ITU-T RECMN F.185-ENLL 1998 Y8b2591 Ob53219 558 m CONTENTS Scope References Definitions and abbreviations . 3.1 Definitions . 3.1.1 Real-time session oriented Internet facsimile (“real-time“) . 3.1.2 Store-and-forward
16、facsimile 3.1.3 Standard facsimile terminal . 3.1.4 Gateway . 3.1.5 Email client 3.1.6 Internet Aware Facsimile terminal (IAF) 3.2 Abbreviations Models for Internet access General provisions 5.1 General 5.2 Basic requirements 5.3 Standardized options . Network requirements Procedures for the transmi
17、ssion of documents . Coding scheme . Recommendation F.185 (06/98) Page 1 1 2 . 111 Recommendation F.185 INTERNET FACSIMILE: GUIDELINES FOR THE SUPPORT OF THE COMMUNICATION OF FACSIMILE DOCUMENTS (Geneva, 1998) 1 Scope This Recommendation describes the guidelines for the support of the communication
18、of facsimile documents (both Group 3 and Group 4) via the Internet in real-time or store-and-forward mode. NOTE - Support for Group 4 is for further study. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provi
19、sions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; all users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommend
20、ations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. - - - ITU-T Recornmendation T.4 (1 996), Standardization of Group 3 facsimile terminals for document transmission. ITU-T Recommendation T.563 ( 1996), Terminal characteristics for Gr
21、oup 4 facsimile apparatus. ITU-T Recommendation T.37 (1998), Procedures for the transfer of facsimile datu viu store-and-forward on the internet. ITU-T Recommendation T.38 (1998), Procedures for real-time Group 3 facsimile communication over 1P nerworks. - 3 Definitions and abbreviations 3.1 Definit
22、ions This Recommendation defines the following terms: 3.1.1 Real-time session oriented Internet facsimile (“real-time“) Real-time session oriented Internet facsimile involves the transmissionlreception of a facsimile in a single session such that confirmation of receipt is provided to the transmitti
23、ng terminal prior to disconnection. Real-time session oriented communication over the Internet between two facsimile terminals conforming to the relevant ITU-T Recommendations is accomplished when: I) the contents and sequence of standard messages exchanged between the sending and receiving terminal
24、s are preserved, as far as practicable; the call duration using the Internet is comparable to that of a facsimile session using the GSTNIISDN between the two terminals. 2) This definition is valid both for terminals connected directly to the Internet and for terminals using another network for acces
25、s to the Internet. 3.1.2 Store-and-forward facsimile 3.1.2.1 takes place via the store-and-forward mode on the Internet using Internet Email. This involves the transmission/reception of a facsimile other than in real-time. Such transrnissionlreception Recommendation F.185 (06/98) 1 3.1.2.2 coded ima
26、ge is transmitted. 3.1.2.3 conforming to the relevant ITU-T Recommendations is accomplished when: i) 2) 3) This definition is valid both for terminals connected directly to the Internet (Internet Aware Facsimile) and for terminals using another network for access to the Internet. “Simple“ mode store
27、-and-forward facsimile communication over the Internet is accomplished when only the “Full“ mode store-and-forward facsimile communication over the Internet between two facsimile terminals the capabilities of the terminals are exchanged; an acknowledgement of receipt is exchanged between gateways an
28、d may be transferred from the receiving terminal to the sending terminal; the contents of standard messages used by the transmitting terminal are preserved. 3.1.3 Standard facsimile terminal A standard facsimile terminal is a system currently capable of sending and receiving facsimile documents in a
29、ccordance with the relevant ITU-T Recommendations. Such a terminal has no capabilities to enable it to send or receive store-and- forward facsimile. A standard facsimile terminal may be connected to a gateway to provide the functionality of an Internet Aware Facsimile. 3.1.4 Gateway A gateway provid
30、es access to the Internet for standard facsimile terminals. A gateway service is capable of accepting facsimile documents from, and capable of sending facsimile documents to, standard facsimile terminals. The responsibilities of such gateways are for further study. 3.1.5 Email client An Email client
31、 is a UA capable of sending and receiving Internet Email and capable of store-and-forward facsimile. Such a client may be an Email package conforming to the relevant Internet standards and the connection to the Internet may be via a local network or via a dial-up call over the GSTN or ISDN. 3.1.6 In
32、ternet Aware Facsimile terminal (IAF) For store-and-forward facsimile, an Internet Aware Facsimile terminal combines the capabilities of a standard facsimile terminal and an Email client. For real-time facsimile, an Internet Aware Facsimile terminal has the capabilities of a standard facsimile termi
33、nal as well as having an IP address or domain name together with its GSTN address. In either mode, it is capable of sending and receiving facsimile documents via the appropriate network. 3.2 Abbreviations This Recommendation uses the following abbreviations: Email Electronic Mail Group 3 Group 4 GST
34、N General Switched Telephone Network IAF Internet Aware Facsimile terminal ISDN Integrated Services Digital Network UA User Agent Terminal conforming to Recommendation T.4 Terminal conforming to Recommendation T.563 4 Models for Internet access The diagrams below show different methods of Internet a
35、ccess for PC Email clients, Internet Aware Facsimile terminals and standard facsimile terminals connected via a gateway. Such connections may be used for store-and-forward facsimile or real-time facsimile. 2 Recommendation F.185 (06/98) STD-ITU-T RECHN F-185-ENGL 1998 V8b259i Ob53222 042 + Figure 1
36、shows the methods for store-and-forward Internet facsimile and Figure 2 shows the methods for real-time Internet facsimile. Internet Aware Fax terminal (IAF) As an option, in case of communication difficulties with the real-time method, it is permitted to fali back to the store- and-forward mode. Ga
37、teway Standard fax terminal Email client The Intemet Internet Aware Fax terminal (IAF) I Standard fax terminal Gateway T0828030-98/40 1 Figure llF.185 - Store-and-forward operation (T.37) Internet Internet terminal (IAF) terminal (IAF) b AwareFax T0828040-98/602 Figure 2rn.185 - Real-time operation
38、(T.38) 5 General provisions 5.1 General The essential characteristic of the guidelines for the support of the communication of facsimile documents over the Internet is that it provides a basic level of compatibility between all terminals supporting the capabilities. The communication of facsimile do
39、cuments via the GSTN or ISDN has a greater level of message privacy than via the Internet. The use of security enhancements on the Internet increases the level of message privacy. Recommendation F.185 (06/98) 3 5.2 Basic requirements 1) The basic level of compatibility is provided between any two te
40、rminals both nationally and internationally so that they may communicate image coded information to each other. This is to be achieved by requiring that terminals comply with the relevant ITU-T Recommendations as modified for transmission across the Internet. It should be possible to extend the supp
41、ort of the communication of facsimile documents on the Internet to any number of countries. It should enable the transport of the recipient terminal addressing information across the Internet. To permit private use options, there shall be no technical limitation on the bit sequence of the users info
42、rmation that may be transmitted. A received Internet facsimile document can be printed or displayed as decided by the recipient and taking into account the terminal characteristics. In the simple mode, terminal-to-terminal receipt acknowledgement need not be provided. In the full mode, terminal- to-
43、terminal receipt acknowledgement shall be provided. The receipt acknowledgement shall contain information to indicate successful receipt or an indication of any error. An example might be the rejection of a request to relay a store-and-forward facsimile document to a standard facsimile terminal. It
44、is intended that the support of communication of facsimile documents on the Internet should require no changes to the Recommendations for existing services or networks. The intention is that the terminals memory requirement is one page. 2) 3) 4) 5) 6) 7) 8) 9) 10) The intention is that the support o
45、f communication of facsimile documents on the Internet should not create additional difficulties for users, e.g. handling the reception of large volumes of unsolicited bulk advertising. 5.3 Standardized options It is recognized that some users may need to use their facsimile terminals to communicate
46、 nationally and internationally using features that are not included in the basic requirements. A number of ITU-T standardized options have therefore been defined. However, the provision of any option may lead to some degree of incompatibility and the number of standardized options has been restrict
47、ed to those features for which a clear international need can be foreseen, In real-time, the sending terminal shall ensure the transmission of documents using only those options that have been indicated as being available at the receiving terminal. In the store-and-forward mode, the sending terminal
48、 shall ensure the transmission of documents using only those options that have been indicated as being available at the receiving terminal where these are known. 6 Network requirements i) The support for the communication of facsimile documents over the Internet may be provided over all public netwo
49、rks using the appropriate ITU-T Recommendations for the network concerned. Terminals on any public network which support the communication of facsimile documents over the Internet shall be able to communicate automatically with any other facsimile terminals. 2) 7 Procedures for the transmission of documents The technical procedures for support for the communication of facsimile documents over the Internet are given in Recommendations T.37 for store-and-forward and T.38 for real-time Group 3 documents. 8 Coding scheme All image coding schemes defined in the ITU-T T-series Recommendations
