M39 传真电报设备 标准查询与下载

ITU-T S.7 FRENCH-1988 电传机马达的控制

The CCITT, considering that, in the case of public and private point-to-point circuits, it is desirable that the teleprinter motors should be started with the commencement of traffic signalling and stopped with the cessation of such signalling; that the general practice on such circuits is to utilize a time-delay device associated with the teleprinter which allows of such operation.

CONTROL OF TELEPRINTER MOTORS

ITU-T S.6 SPANISH-1988 应答信号单位的特性(国际2号电码)

The CCITT, considering Recommendations F.60 [4] and F.21 [5] concerning the telex and gentex services respectively; that start-stop equipment is capable of receiving communications without the help of an operator; that this advantage is useful to users of the international Telegraph Alphabet No.2 (ITA2).

CHARACTERISTICS OF ANSWERBACK UNITS (ITA2)

ITU-T S.6 FRENCH-1988 应答信号单位的特性(国际2号电码)

The CCITT, considering Recommendations F.60 [4] and F.21 [5] concerning the telex and gentex services respectively; that start-stop equipment is capable of receiving communications without the help of an operator; that this advantage is useful to users of the international Telegraph Alphabet No.2 (ITA2).

CHARACTERISTICS OF ANSWERBACK UNITS (ITA2)

ITU-T T.351 FRENCH-1988 传真机字符信息的成像过程

This Recommendation intends to specify the method for positioning in a correct manner character structured messages, in facsimile pages, conforming to the format defined in Recommendation T.4 Group 3 facsimile apparatus, and Recommendation T.563 for facsimile Group 4 apparatus. The intention is to insure the printing of the information inside the guaranteed printable area of the facsimile pages. This Recommendation specify in terms of facsimile picture elements (pels), the initial position and spacing of the characters along the lines and the spacing between the lines, for creating a facsimile page from the character structured information. It does not define neither the shape, nor the repertoire of the characters to be imaged, which is of the responsibility of the application. Different types of character encoded information, to be printed on both Group 3 and Group 4 facsimile apparatus, are considered, namely teletex, telex, videotex and IA 5 text. Consideration of mixed mode information requires further study. This Recommendation applies when interworking implying image conversion between different type of information, including facsimile, is required within a regulated service, such as MHS service.

IMAGING PROCESS OF CHARACTER INFORMATION ON FACSIMILE APPARATUS

ITU-T T.390 FRENCH-1988 电报业务交互工作的电报要求

Recommendation F.200 lays down the provisions for the operation of the automatic international Teletex service. In particular, Recommendation F.200 defines the basic service requirements and principles for interworking between Teletex and telex services via a conversion facility (CF). Recommendation T.60 defines the requirements for terminal equipment used in the international Teletex service, including the interworking with telex terminals, and the conversion table to the telex repertoire in case of interworking. Recommendation T.61 defines the character repertoire and the coded character sets for the Teletex service. Recommendation T.62 defines the end-to-end control procedures to be used within the Teletex service as well as between a Teletex terminal and a Teletex/telex conversion facility (CF). Recommendation T.70 defines the network-independent basic transport service applicable to Teletex terminals, as well as between a Teletex terminal and a CF. This Recommendation defines the requirements additional to Recommendation T.62 for use between a Teletex terminal and a CF to provide interworking between Teletex and telex services, using store-and-forward principles, in the following cases: a) when the CF and Teletex terminal are in the same country, with message transfer in either direction; b) when the CF and Teletex terminal are in different countries, with message transfer in the CF to Teletex terminal direction. This is subject to bilateral agreement.

TELETEX REQUIREMENTS FOR INTERWORKING WITH THE TELEX SERVICE

ITU-T T.390 SPANISH-1988 电报业务交互工作的电报要求

Recommendation F.200 lays down the provisions for the operation of the automatic international Teletex service. In particular, Recommendation F.200 defines the basic service requirements and principles for interworking between Teletex and telex services via a conversion facility (CF). Recommendation T.60 defines the requirements for terminal equipment used in the international Teletex service, including the interworking with telex terminals, and the conversion table to the telex repertoire in case of interworking. Recommendation T.61 defines the character repertoire and the coded character sets for the Teletex service. Recommendation T.62 defines the end-to-end control procedures to be used within the Teletex service as well as between a Teletex terminal and a Teletex/telex conversion facility (CF). Recommendation T.70 defines the network-independent basic transport service applicable to Teletex terminals, as well as between a Teletex terminal and a CF. This Recommendation defines the requirements additional to Recommendation T.62 for use between a Teletex terminal and a CF to provide interworking between Teletex and telex services, using store-and-forward principles, in the following cases: a) when the CF and Teletex terminal are in the same country, with message transfer in either direction; b) when the CF and Teletex terminal are in different countries, with message transfer in the CF to Teletex terminal direction. This is subject to bilateral agreement.

TELETEX REQUIREMENTS FOR INTERWORKING WITH THE TELEX SERVICE

ITU-T S.3 SPANISH-1988 使用国际2号电码(ITA2)的局部终端的传输特性

The CCITT, considering that this Recommendation defines the characteristics from a transmission point of view of start-stop terminal equipment working at rates up to 300 bauds; that this Recommendation applies-except where otherwise specified – to start-stop apparatus in general: i.e. it applies to teleprinters, data terminal equipment, multiplexer tributaries, etc.; that user classes of service 1 and 2 in Recommendation X.1 [1] should be taken into account.

TRANSMISSION CHARACTERISTICS OF THE LOCAL END WITH ITS TERMINATION (ITA2)

ITU-T S.3 FRENCH-1988 使用国际2号电码(ITA2)的局部终端的传输特性

The CCITT, considering that this Recommendation defines the characteristics from a transmission point of view of start-stop terminal equipment working at rates up to 300 bauds; that this Recommendation applies-except where otherwise specified – to start-stop apparatus in general: i.e. it applies to teleprinters, data terminal equipment, multiplexer tributaries, etc.; that user classes of service 1 and 2 in Recommendation X.1 [1] should be taken into account.

TRANSMISSION CHARACTERISTICS OF THE LOCAL END WITH ITS TERMINATION (ITA2)

ITU-T S.3-1988 用国际No.5电码的基本型纸页打印机的标准化

In all cases “distortion” should be taken as gross start-stop distortion [4], using the appropriate alphabet.It is recommended that the measurement should be made with a start-stop distortion measuring set,for a period in accordance with Recommendation R.5 [5].

TRANSMISSION CHARACTERISTICS OF THE LOCAL END WITH ITS TERMINATION (ITA2)

ITU-T U.3 FRENCH-1988 将错误呼叫信号影响最小化的交换设备的安排

The CCITT considering (a) that transmission systems at present in use for international telex trunks are liable to generate false calling signals; (b) that such false calling signals can seize and engage switching equipment, thereby reducing the grade of service. This is of particular importance with systems in which common equipment normally used only to set up calls is seized by false calling signals; (c) that the ill effects of false calling signals can be minimized by delaying the operation of the calling relay at the termination of the international telex trunk circuit; (d) that, however, when direct dial selection is employed over an international trunk line, unless it is a manually selected circuit not preceded by a stage of automatic selection, there is normally insufficient time available between successive digits to permit the use of slow operating relays; (e) that, nevertheless, Administrations may agree among one another to use digit storage at the outgoing end of the circuit so that the inter-train pause can be increased to permit the calling relays to be made slow to operate.

ARRANGEMENTS IN SWITCHING EQUIPMENT TO MINIMIZE THE EFFECTS OF FALSE CALLING SIGNALS

ITU-T U.3 SPANISH-1988 将错误呼叫信号影响最小化的交换设备的安排

The CCITT considering (a) that transmission systems at present in use for international telex trunks are liable to generate false calling signals; (b) that such false calling signals can seize and engage switching equipment, thereby reducing the grade of service. This is of particular importance with systems in which common equipment normally used only to set up calls is seized by false calling signals; (c) that the ill effects of false calling signals can be minimized by delaying the operation of the calling relay at the termination of the international telex trunk circuit; (d) that, however, when direct dial selection is employed over an international trunk line, unless it is a manually selected circuit not preceded by a stage of automatic selection, there is normally insufficient time available between successive digits to permit the use of slow operating relays; (e) that, nevertheless, Administrations may agree among one another to use digit storage at the outgoing end of the circuit so that the inter-train pause can be increased to permit the calling relays to be made slow to operate.

ARRANGEMENTS IN SWITCHING EQUIPMENT TO MINIMIZE THE EFFECTS OF FALSE CALLING SIGNALS

ITU-T U.6 FRENCH-1988 全自动国际电报业务中欺诈性传输的预防

The CCITT considering that, with fully automatic working in the international telex service, the possibility of fraudulent routing by subscribers of international calls involving tandem connection of international telex trunks might arise whenever subscribers are given automatic access to international telex trunk circuits that have, at their incoming ends, automatically switched access to other international telex trunk circuits.

PREVENTION OF FRAUDULENT TRANSIT TRAFFIC IN THE FULLY AUTOMATIC INTERNATIONAL TELEX SERVICE

ITU-T U.6 SPANISH-1988 全自动国际电报业务中欺诈性传输的预防

The CCITT considering that, with fully automatic working in the international telex service, the possibility of fraudulent routing by subscribers of international calls involving tandem connection of international telex trunks might arise whenever subscribers are given automatic access to international telex trunk circuits that have, at their incoming ends, automatically switched access to other international telex trunk circuits.

PREVENTION OF FRAUDULENT TRANSIT TRAFFIC IN THE FULLY AUTOMATIC INTERNATIONAL TELEX SERVICE

ITU-T U.8 FRENCH-1988 用户电报和电路交换公众电报的假设参考连接

The CCITT considering (a) the operational provisions for the telex service and the gentex network indicated in Recommendations F.60 and F.20; (b) the overall subscriber-to-subscriber performance objectives; (c) the technical provisions in Recommendations R.57 and R.58 concerning standard limits of transmission quality; (d) the need to standardize the signalling functions in international/intercontinental transit exchanges; (e) the telex signalling specified in Recommendations U.1 (types A and B), U.11 (type C) and U.12 (type D); (f) the level differences existing among the type A, B, C and D signalling functions.

HYPOTHETICAL REFERENCE CONNECTIONS FOR TELEX AND GENTEX NETWORKS

ITU-T U.8 SPANISH-1988 用户电报和电路交换公众电报的假设参考连接

The CCITT considering (a) the operational provisions for the telex service and the gentex network indicated in Recommendations F.60 and F.20; (b) the overall subscriber-to-subscriber performance objectives; (c) the technical provisions in Recommendations R.57 and R.58 concerning standard limits of transmission quality; (d) the need to standardize the signalling functions in international/intercontinental transit exchanges; (e) the telex signalling specified in Recommendations U.1 (types A and B), U.11 (type C) and U.12 (type D); (f) the level differences existing among the type A, B, C and D signalling functions.

HYPOTHETICAL REFERENCE CONNECTIONS FOR TELEX AND GENTEX NETWORKS

ITU-T U.21 FRENCH-1988 无线电报电路建立的用户电报呼叫的二次呼叫

The CCITT considering that experience has shown that, for telex calls set up over a radiotelegraph circuit, it was useful to enable the telex subscriber to cause an operator to re-enter on a call in progress without interrupting it.

OPERATOR RECALL ON A TELEX CALL SET UP ON A RADIOTELEGRAPH CIRCUIT

ITU-T U.21 SPANISH-1988 无线电报电路建立的用户电报呼叫的二次呼叫

The CCITT considering that experience has shown that, for telex calls set up over a radiotelegraph circuit, it was useful to enable the telex subscriber to cause an operator to re-enter on a call in progress without interrupting it.

OPERATOR RECALL ON A TELEX CALL SET UP ON A RADIOTELEGRAPH CIRCUIT

ITU-T U.23 FRENCH-1988 用于全自动按时收费电报呼叫且具有无线电电报电路及自动请求重发设备的电报线路

The Recommendation declares the following view that Administrations operating radiotelegraph circuits equipped with ARQ systems that may be engaged in a fully-automatic telex call, such that the charging of the subscriber is made automatically in the originating country according to the elapsed time of the connection, must take precautions to avoid too great a difference between the charged time and the time during which the radiotelegraph circuit was efficient.

USE OF RADIOTELEGRAPH CIRCUITS WITH ARQ EQUIPMENT FOR FULLY AUTOMATIC TELEX CALLS CHARGED ON THE BASIS OF ELAPSED TIME

ITU-T U.23 SPANISH-1988 用于全自动按时收费电报呼叫且具有无线电电报电路及自动请求重发设备的电报线路

The Recommendation declares the following view that Administrations operating radiotelegraph circuits equipped with ARQ systems that may be engaged in a fully-automatic telex call, such that the charging of the subscriber is made automatically in the originating country according to the elapsed time of the connection, must take precautions to avoid too great a difference between the charged time and the time during which the radiotelegraph circuit was efficient.

USE OF RADIOTELEGRAPH CIRCUITS WITH ARQ EQUIPMENT FOR FULLY AUTOMATIC TELEX CALLS CHARGED ON THE BASIS OF ELAPSED TIME

ITU-T U.24 FRENCH-1988 符合推荐性规范R.44中同步多路复用设备的电传和自通电报操作要求

The Recommendation considering: (a) that it may be desirable to use synchronous systems described in Recommendation R.44 in the teleprinter switching networks; (b) that it is essential to transmit the full range of telex signals for types A, B and C signalling.

REQUIREMENTS FOR TELEX AND GENTEX OPERATION TO BE MET BY SYNCHRONOUS MULTIPLEX EQUIPMENT DESCRIBED IN RECOMMENDATION R.44