1、CCITT RECMN+F.423 92 W 48b2591 0574590 170 INTERNATIONAL TELECOMMUNICATION UNION CCITT THE INTERNATIONAL TELEGRAPH AND TELEPHONE CONSULTATIVE COMMITTEE MESSAGE HANDLING SERVICE OPERATIONS AND DEFINITION OF SERVICE F.423 (08/92) MESSAGE HANDLING SERVICES: INTERCOMMUNICATION BETWEEN THE INTERPERSONAL
2、MESSAGING SERVICE AND THE TELEFAX SERVICE Recommendation F.423 CCITT RECMN*F-423 92 m 4862.593 0574593 O07 m FOREWORD The CCIT (the International Telegraph and Telephone Consultative Committee) is a permanent organ of the International Telecommunication Union (ITU). CCIT is responsible for studying
3、technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The Plenary Assembly of CCIT which meets every four years, establishes the topics for study and approves Recommendations prepared by its Study Groups. T
4、he approval of Recommendations by the members of CCITT between Plenary Assemblies is covered by the procedure laid down in CCITT Resolution No. 2 (Melbourne, 1988). Recommendation F.423 was prepared by Study Group I and was approved under the Resolution No. 2 procedure on the 4th of August 1992. CcI
5、T NOTES 1) telecommunication administration and a recognized private operating agency. 2) In this Recommendation, the expression “Administration” is used for conciseness to indicate both a A list of abbreviations used in this Recommendation can be found in Annex B. O ITU 1993 All rights reserved. No
6、 part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. CCITT RECMN*F-423 92 = 4862591 0574592 T43 m Recommendation F.423 MESSAGE HANDLING SERVICES: INTERCOMMUNICA
7、TION BETWEEN THE INTERPERSONAL MESSAGING SERVICE AND THE TELEFAX SERVICE (1992) The establishment in various countries of message handling services in association with public networks, creates the need to produce Recommendations covering the aspects of public message handling services. TABLE OF CONT
8、ENTS 1 Scope 2 Functional model 3 Service outline 4 Operational procedures 5 Quality of Service Annex A - Action to be taken by the PFAXAU 1 Scope 1.1 This Recommendation describes the service definition and general operational procedures for intercommunication between the public (Interpersonal Mess
9、aging) (IPM) service and the telefax services. 1.2 exchange messages with the users of the other service. 1.3 The intercommunication is based on store-and-forward principles and ailows the users of one service to For facsimile users who are also registered as users of the IPM service, see Recommenda
10、tion F.420. 2 Functional model 2.1 The IPM service is a messaging service which may be provided on a variety of networks and ailows several forms of address, whereas the telefax services provide direct connection between user terminals in the public switched networks. 2.2 Therefore, to match the dis
11、similar characteristic of the services, it is necessary to provide intercommunication via a public facsimile access unit (PFAXAU). In both the IPM service to the telefax service, and the telefax service to the IPM service directions, the complete message is deposited in the PFAXAU for onward transmi
12、ssion. 2.3 The functional model for intercommunication described in this Recommendation is shown in Figure 1P.423. Recommendation FA23 (OW2) 1 CCITT RECMNaF.423 92 m 4862593 0574593 98T m UA Useragent FIGURE iF.423 Fiinctionai model 3 Service outline 3.1 PFAXAU. Delivery of message to telefax servic
13、e users from the IPM service and vice versa is provided by means of a 3.2 The PFAXAU belongs to the message handling system (MHS) domain. I 3.3 delivery to the telefax service user terminai has been completed. In the IPM service to telefax service direction, the IPM service FTAXAU is responsible for
14、 the message until 3.4 the message to the IPM service user terminai, once the input is completed under normal conditions. in the telefax service to IPM service direction, the IPM service PFAXAU is responsible for the delivery of 3.5 The PFAXAU may be located in the country of origin or country of de
15、stination as shown in Figure W.423. Where two Administrations offer an IPM service, the international exchange of messages should be via the IPM service. Country A Country B IPM-UA =Y-l PFAXAU Country A Country B IPM-UA PFAXAU Fax MTS Message transfer system 2 Recommendation FA23 (08/92) TO1 O1 640-
16、90 FIGURE 2F.423 Location of PFAXAU CCITT RECMN*F.423 92 D 4b259L 0574594 Lb D I 3.6 and the PFAXAU should be via the international public switched networks. Where an Adminisiration does not provide an IPM service, then connections between the telefax service user 3.7 The elements of service applica
17、ble to this intercommunication should follow Recommendation F.420. 4 Operational procedures 4.1 4.1.1 appropriate IPM elements of service, in accordance with Recommendation F.420. 4.1.2 The terminal originatorhecipient (OB) address of the telefax service user, as defined in Recommendation F.401, sho
18、uld be used to route a message to the telefax service user terminal. 4.1.3 defined for the telefax service. The delivery of IF-message to group 4 terminals is for further study. IPM service to telefax service direction Messages from an IPM service user to a telefax user are sent as normal interperso
19、nal (LP)-messages with the When a message is received by the PFAXAU, the IP-message will be converted into the pup 3 format Note - The conversion may take piace in the message transfer agent (MTA) associated with the PFAXAU. 4.1.4 The PFAXAU shall be responsible for the action to be taken for IPM el
20、ements of service received in accordance with Recommendation F.420. Annex A shows the examples of the elements of service and the proposed action to be taken by the PFAXAU. 4.1.5 normal telefax service procedures (see Recommendation T.30). 4.1.6 of this identification is a local matter. 4.1.7 CaU es
21、tablishment to the telefax user and delivery of the facsimile message should be in accordance with The IF-message sent to the telefax user tenninal may be preceded by a PFAXAU identification. The content A general layout of an IP-message delivered to a telefax user is shown in Figure 3P.423. IPM ser
22、vice b Telefax service B m Heading -, Header Text TO101850-90 FIGURE 3F.423 IF-message to a telefax format Recommendation FA23 (08/92) 3 CCITT RECMN*F-423 92 48b259L 0574595 752 4.1.8 The elements of service related to the IP-message envelope and heading shall be converted into readable header. The
23、PFAXAU shall deliver the header to a telefax user. The format and the language of this header is a local matter. The PFAXAU shall transmit the originator O/R address in a form suitable for recall. 4.1.9 Upon delivery of the message to the telefax user terminal, a delivery notification should be sent
24、 back to the originating IPM service user if requested. In the event of nondelivery of the message to the telefax user terminal, a non-delivery notification should be sent back to the IPM service user. 4.1.10 operator of the MHS domain providing the PFAXAU to advise the originator via other suitable
25、 means. If a notification cannot be delivered to the originating IPM service user terminal, it is the responsibility of the 4.2 Telefar to IPM service direction 4.2.1 The general selection procedures for telefax service users is for further study. 4.3 Construction of IPM message For further study. 5
26、 Quality of Service 5.1 possible, the Quality of Service objectives of each individual service. Provision of intercommunication between the IPM service and the telefax services should maintah, as far as 5.2 defined in the T-Series Recommendations. The support of standardized optional user facilities
27、 is for further study. The PFAXAU shall be capable of supporting the basic requirements of the facsimile terminai equipment as 5.3 The PFAXAU design, dimensioning and retry algorithm is a local matter. 5.4 The method of recovery when the transmission of a message from the PFAXAU to the destination t
28、elefax user terminal is interrupted, should be in accordance with store and forward facsimile service (see Recommendation F. 162). 4 Recommendation F.423 (08/92) CCITT RECMN+F=423 92 m 4862591 0574576 677 m ANNEX A (to Recommendation F.423) Actions to be taken by the PFAXAU Basic IPM elements of ser
29、vice and essential optional IPM user facilities which have to be processed by the PFAXAU in the case where a message is sent from the PM service to the fax service direction (see Table A-1F.423). TABLE A-1P.423 References Rec. F.400 Annex B Action to be taken by the PFAXAU Elements of service Displa
30、y in header B.5 Authorizing users indication B .6 Auto-forwarded indication B.8 I Blind copy recipient indication Display the O/R descriptor information to the blind copy recipient(s) but not disclose to either primary or copy recipients The PFAXAU shall send a non-delivery notification to the origi
31、nator Body part encryption indication I I I B.12 Content type indication National matter for content types different than P2 and P22 If G3 fax body part, ignore; otherwise the PFAXAU generate a non-delivery notification B.13 I Conversion prohibition I Local matter B.15 Converted indication B.18 Cros
32、s referencing indication Display in header B.21 The PFAXAU shall send a delivery notification to the originator Delivery notification I B .22 DeliveIy time stamp indication Local matter Ignore B.26 DL expansion history indication B.29 Expiry date indication Display in header Forwarded IP-message ind
33、ication Grade of delivery selection Importance indication The PFAXAU shall display all headers Local matter Display in header B.37 IP-message identification B.38 Language indication Display in header Ignore PFAXAU should honour Latest delivery designation Message identification Multi-destination del
34、ivery Local matter Deliver the message to all recipients B .46 Messages containing not supported body parts are not delivered. Send back a non-delivery notification to the originator Multi-part body Recommendation FA23 (OW92) 5 CCITT RECIN*F-423 92 4862593 0574597 525 = Non-delivery notification Non
35、-receipt notification request indication References Rec. F.400 Annex B The PFAXAU shall generate a delivery report Note 1 I Obsoleting indication Original encoded information types indication I- Local matter Local matter l Originator indication Originator requested alternate recipient I Display in h
36、eader Local matter I B.62 Primary and copy recipients indication Robe tB.63 Display the O/R descriptor information of the recipients in the header Local matter I Receipt notification request indication Reply request indication Replying IP-message indication TABLE A-llF.423 (coa.) Note 2 Display in h
37、eader Local matter Elements of service Sensitivity indication Subject indication Action to be taken by the PFAXAU Local matter Display in header Submission time stamp indication Typed body Display in header Local matter Note 1 -Non-delivery notification is returned when transmission to the destinati
38、on facsimile terminal is not successful. Note 2 - Receipt notification may be returned according to the request in the subject message when message transmission to the destination facsimile terminal is completed. In this context, the use of receipt notification has an equivalent meaning to positive
39、delivery notification for PFAXAU as described in J 4.1.9 of this Recommendation. ANNEX B (to Recommendation F.423) Alphabetical list of abbreviations used in this Recommendation IP IPM MHS MT MTA MTS OR PFAXAU interpersonal Interpersonal messaging Message handling system Message transfer Message transfer agent Message transfer system riginator/recipien t Public facsimile access unit 6 Recommendation F.423 (08/92)
