1、 TTE07-04 Page E I Recommendation T/TE 07-04 (Edinburgh 1988) SERVICE INTERCOMMUNICATION REQUIREMENTS FOR TELETEX TERMINALS proposed by the Working Group T/WG 10 “Terminal Equipment” Text of the Recommendation adopted by the “Telecominimcatiois” Commissioii: “The Europan Conference of Postal and Tel
2、ecommunications Administrations, considering - the work undertaken within CEPT with the view to harmonise international telecommunication, - that TELETEX services are implemented in a number of countries, - that CCITT Recommendations T.60, T.61, T.62 and T.70 describe the technical requirements for
3、Teletex terminal - that CCITT Recommendation T.390 describes the use of Control Documents when accessing Conversion - that CEPT SWG TE 2 has studied the harmonisation of TELETEX terminals under study point TC1, equipment, O Facilities, recommends to the member Administrations of the CEPT to apply th
4、e specications contained in this Recommendation in addition to those contained in CEPT Recommendation T/TE 07-01 bis E.” ._ Edition of June 30, 1989 .- A - J ,/- W 232b414 O010159 9 T/TE 07-04 E Page 2 FOREWORD This Recommendation describes the additional requirements to basic Teletex terminals for
5、intercommunication with the Telex service via a Conversion Facility. It has to be used together with CEPT Recommendation T/TE 07-01 bis E for a complete description of Teletex terminals participating in the international Teletex service. It describes the various national requirements for accessing t
6、he Conversion Facilities, and gives an overview on the various kinds of document types. Contents Part 1. GENERAL O. INTRODUCTION 1. SCOPE AND FIELD OF APPLICATION 2. REFER ENCES 3. DEFINITIONS 4. ABBREVIATIONS 5. SCENARIO DESCRIPTION 6. CONFORMITY Part 2. AMENDMENTS TO CCITT RECOMMENDATION T.390 Par
7、t 3. CONTROL DOCUMENT SPECIFICATIONS Edition of June 30, 1989 _I TITE 07-04 E Part 1, Page 1 Part O O. 1. 2. . GENERAL INTRODUCTION This Recommendation dehes the service intercommunications requirements for terminal equipment par- ticipating in the European Teletex service and accessing other text c
8、ommunication services, such as e.g. telex. The additional requirements described herein offer means of preparing character coded text messages and of conveying them to a conversion facility. In this Recommendation the requirements of the following CEPT Administrations have been incorporated : Austri
9、a (A) Belgium (B) Denmark (DK) Finland (SF) Norway (N) France (F) Germany (D) (Fed. Rep. of) Greece (GR) Ireland (EI) Italy (I) Luxembourg (L) Netherlands (NL) Portugal (P) Spain (E) Sweden (S) Switzerland (CH) United Kingdom (UK) National Requirements for Teletex Terminal Equipment Specification fo
10、r access to Belgian Teletex service Nordic Teletex Specification NT-SPEC No. T-xxx Spcification du Service Teletex Teletex terminal specification No specification available yet No specification available yet Specification for Teletex terminals over CSPDN (N 694) No specification available yet Telete
11、x terminal specification No specification available yet Teletex terminal specification Technical Requirements for connection of equipment to the Teletex service in Sweden Teletex national requirements for Teletex terminal equipment Teletex service technical guide SCOPE AND FIELD OF APPLICATION This
12、Recommendation describes the specifications to be used for basic Teletex terminal equipment for intercommunication purposes. This Recommendation is based on the Blue Book versions (1988) of the relevant CCITT Recommendations. In addition it enumerates the various administration-specific technical re
13、quirements. Other CEPT Recommendations dealing with Teletex terminal equipment or Teletex service are referenced in this document. Note. Throughout this Recommendation the term “Administration” should be taken to read as either “Administration” or “Recognized Private Operating Agency”. REFERENCES CC
14、ITT Recommendation T.60 : Terimhd equmeiit for irse in the Teletex service (1988) CCITT Recommendation T. 61 : Character repertoire and coded character sets for the interiiatioiial Teletex CCITT Recommendation T.62: Control procedures for Teletex arid Group 4 Facsimile Services (1988) CCITT Recommen
15、dation T.63 : Provisions for verijcation of Teletex teritiinal coiipliance (1988) CCITT Recommendation T.64 : Coiformance Testing Procediires for the 1984 version Teletex Recommeit- CCITT Recommendation T.70 : Network-Imlependent Basic Traiisport service for the Telematic Services CCITT Recommendati
16、on T.90 : Characteristics aiid Protocols for Terizziiials for Telematic Services iii CCITT Recommendation T.330 : Telematic Access to liiterpersoml Messagiiig System CCITT Recommendation T.390: Teletex Requirements for IiiterworkiFig with the Telex Service (1988) CCITT Recommendation F.200: Teletex
17、Service (1988) CCITT Recommendation F.201: Ititerworkiiig between Teletex Service aiid Telex Service (1988) CCITT Recommendation F.203 : Network Based Storage for the Teletex Service service (1988) dations (1988) (1988) ISDN (1 98 8) Edition of June 30, 1989 /-.- I 2326434 0030lbL 7 II TTE07-04 Part
18、 1, Page 2 E CCITT Recommendation U.201: CEPT Recommendation TITE 07-01 bis E: Harmonisation of Teletex terminal equipment CEPT Recommendation TITE 07-02 E: CEPT Recommendation T/CD 08-01 E: CEPT Recommendation TITE 08-04 E: Interworking between Teletex Service and Telex Service (1988) Test procedur
19、es for testing Teletex communication protocol and terminal aspects (1988) Packet-switched data network: permanent access (FS T/3 1) Digital data circuit (circuit switched dada networks) :provision of the OSI connection-mode transport service in the T.70 case for Telematic end systems (FS T/41) Packe
20、t-switched data network: switched access (FS T/32) Teletex Service (1982) CEPT Recommendation TITE 08-06 E: CEPT Recommendation T/SF 22 E: 3. DEFINITIONS The terms used in this Recommendation are defined in the referenced CCITT Recommendations. 4. ABBREVIATIONS The abbreviations used in this Recomme
21、ndation are defined in the referenced CCIT Recommendations. 5. SCENARIO DESCRIPTION Exchange of Teletex documents between two end systems, via a conversion facility, to allow text transfer from a Teletex terminal to another text communication terminal, participating in another service. The overall o
22、peration for the Teletex-Telex-intercommunication case is defined in CCITT Recommendation F.201. 6. CONFORMITY A Teletex equipment is in conformity with this Recommendation, if it follows the requirements that are contained in part 2 of this Recommendation. Note. The tests to be passed in order to c
23、heck the conformance technically are laid down in CCITT Recommendation T.64 and in CEPT Recommendation T/TE 07-02 E. Edition of June 30. IC- - 232b414 00101b2 9 TITE 07-04 E Part 2, Page 1 Part 2. AMENDMENTS TO CCITT RECOMMENDATION T.390 (Teletex Requirements for Interworking with the Telex Service)
24、 National requirements and advisory notes Note. Various items do not relate to terminal specification directly, but clarify what behaviour terminals or terminal-users may expect from the CF. 1. 2. 3. 4. 5. 6. O 7. 8. 9. - Paragraph I .I SlT.390 (SF) The following limitations apply to the link layer:
25、 - The information field of FRMR is not filled. - Reset with SABM in the information phase or after sendinglreceiving of FRMR is not implemented. - Check pointing timer T1 = 3 s. The following limitations apply to the transport layer: - Maximum length of a transport block is 128 bytes. - Paragraph I
26、 .I SIT.390 (UK) The CF will require a calling PSTN based teletex terminal to identify itself via the calling address field of the Call Request packet. This is to identify a PSTN-based terminal for charging purposes. The calling terminal address shall be coded as an NUI. The format of the NUI shall
27、be up to 14 binary coded decimal digits and will be supplied by BT. - Paragraph 1.21T.390 (OK) When calling the Danish CF the Teletex terminal shall use the abbreviated address “.O1 + ”. - Paragraph 1.2.1/T.390 (SF, D, A) After termination of the text call to the telex subscriber, a notification cal
28、l is always set up to the Teletex subscriber. -Paragraph 1.2.3/T.390 (SF, D, I, A) The CF sends notifications to Teletex terminals using control documents. As a basic requirement these notifications must be stored in a non-volatile memory and shown to the user when requested. If the Teletex terminal
29、 is able to process these control documents the relevant information may be made available to the user by other means (e.g. communications log). -Paragraph 2.11T.390 (DK, N, E) During calls to or from the CF the Teletex terminal must not try to initiate Two Way Simultaneous (TWS) mode of communicati
30、ons (CSTW) or to change source/sink relationship (CSCC). - Paragraph 2.1.2.11T.390 (F) When a session is established by the CF, the TID in CSS is derived from the calling telex answerback. Since the telex answerback is not converted into the Teletex format, it must not be checked in the Teletex term
31、inal for format errors. - Table IlT.390 (SF) The Teletex terminal shall use the CFs TID in the respective field of received messages. - Table IIT.390 (SF, D, A) During the establishment of a submission, notification, address validation and delivery call the CF identifies itself by a TID which does n
32、ot comply with the format described in CCITT Recommendation F.200. In all cases this TID consists of 24 characters. Therefore a called terminal shall never perform a conformity check of the format of the TID. A calling terminal shall not perform such a check if it establishes a submission call to th
33、e CF. Edition of June 30. 1989 TITE 07-04 E Part 2, Page 2 For information, the exact formats of the TIDs mentioned above are given in the following table: TIDs used by the CF: Submission Call: (Dl (SF) (A) Notification Call: (Dl (SF) (A) (SF) (A) Delivery Call: (Dl (SF) (A) Address Validation Call:
34、 (D) 123456.ttu.d *) 123456.cf.sf *) 123456.ttu.a *) 41951 1.ftz.d * *) teletex .-. telex.cf.sf. 232509.fza.a ttu.d . teletex .-. telex.cf.sf. ttu.a. teletex.-.telexsfsf . 232509.fzat.a . 419511.ftz.d *I Note. Each dot in this table represents a space character. *) The digits represent the dialling
35、information received by the CF. *) This information is derived from the received telex answerback. 10. - Table 21T.390 (SF, D, A) The Telex Validation and Telex Message Delivery Control Documents are currently not used. 1 I. - Table 2lT.390 (UK) For PSTN-based terminals: in the case of incoming inte
36、rnational telex calls, where telex-Teletex conversion is performed in the United Kingdom (UK), a UK Conversion Facility will make a Validation Call to the destination Teletex terminal to check the terminal identification. 12. - Paragraph 3.1.I/T.390 (all) For formats of various control documents: se
37、e Part 3. of this Recommendation. 13. -Paragraph 3.1.1/T.390 (N, NL) The teletex terminal is not allowed to use a document reference number with more than 4 digits when communicating with the CF. 14. - Paragraph 4.1 and Table 21T.390 (DK, N) The Address Validation Call from the CF does not include a
38、 Telex validation Control Document. The Teletex terminal must be able to receive-but not necessarily to present-the Telex Message Delivery Control Document, see “-Paragraph 4.6.2lT.390 (DK, N)”. Additional to the control documents in Table 2lT.390 a “Telex Status Enquiry” control document may be use
39、d to request a status report from the CF concerning a message which has been delivered to the CF for The elements of the control text in the Telex Status Enquiry control document must be unnumbered and must include the following, see Part 3. of this Recommendation: a) Control document identifier b)
40、One additional element = REFERENCE: with the following parameters separated by slashes (B: - Terminal Identifier of the CF, - Terminal Identifier of the Teletex terminal, - Date and Time, - Control Document Number, - Additional Session Reference Number. All the parameters contain correlation informa
41、tion and therefore must be identical to the same para- meters in the Call Identification Line (CIL) in the related Telex Submission Control Document. The Teletex terminal must be able to present unambiguously to the user the control text in the control documents received from the CF except Telex Mes
42、sage Delivery Control Documents. The control text and formats of the control documents used in DenmarkINorway are indicated in the DanishINorwegian subsections of Part 3. of this Recommendation. . forwarding to telex. Edition of June 30, 1989 i -4 T/IE 07-04 E Part 2, Page 3 When a status request ha
43、s been received by the CF, the CF initiates a new call to originator of the request, establishes a new session and transmits a status report in an operator dociiment (Telex Status Report). The contents and format of the Telex Status Report operator document used in DenmarkINorway are indicated in th
44、e DanishINorwegian subsections of Part 3. of this Recommendation. If the Teletex terminal is capable of sending Telex Status Enquiry Control Documents, it must also be able to receive Telex Status Report Operator Documents from the CF. The Teletex terminal must, as a minimum, treat such operator doc
45、uments as normal documents. 15. - Paragraph 4.2.21T.390 (NL) At the network layer (call request packet) the network number of the conversion facility is used. See Part 3. of this Recommendation. 16. - Paragraph 4.2.31T.390 (SF, A, D) The multi-addressing functionality cannot be used. 11. - Paragraph
46、 4.2.214.2.3lT.390 (DK, N) The elements of the control text in the Telex Submission Control Document which is used by the Teletex terminal must be unnumbered and shall include the following, see DanishINorwegian subsections of Part 3. of this Recommendation. a) Control Document Identifier = TELEX TI
47、L: b) Submission Control Information which may contain up to 10 telex Addresses: - every telex address shall start on a new line, - a numerical field (the telex number) shall be kst on the line (leading blanks will be discarded) and . must be followed by one or more spaces. The optional parameters A
48、nswerback and Acknowledgement Request may be used as follows : - Answerback, if included, shall follow on the same line as the related telex address and shall be - Acknowledgement Request, if included, must be required by adding +ACK as last element value preceded by an equal sign (=). Spaces follow
49、ing the equal sign are ignored. field on the same line as the related telex address. 18. - Paragraph 4.2.314.2.4lT.390 (UK, E) The CF will support the following types of operation within a single session: - one or more Teletex documents covered by the same control document; - one or more telex addresses (up to 10 addresses) in the same control document; - one or more control documents, each with its related Teletex documents in the same session. As a minimum requirement ail terminals shall, in a single session, be able to send one control document having one telex ad
