ITU-T R.52

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INTERNATIONAL TELECOMMUNICATION UNION

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TELECOMMUNICATION

STANDARDIZATION SECTOR

OF ITU

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(Extract from the "LUE"OOK)

NOTES

1 ITU-T Recommendation R.52 was published in Fascicle VII.1 of the Blue Book. This file is an extract from the

Blue Book. While the presentation and layout of the text might be slightly different from the Blue Book version, the

contents of the file are identical to the Blue Book version and copyright conditions remain unchanged (see below).

2 In this Recommendation, the expression “Administration” is used for conciseness to indicate both a

telecommunication administration and a recognized operating agency.

 ITU 1988, 1993

mechanical, including photocopying and microfilm, without permission in writing from the ITU.

Fascicle VII.1 - Rec. R.52 1

Recommendation R.52

Fascicle VII.1 - Rec. R.52

STANDARDIZATION OF INTERNATIONAL TEXTS FOR THE

MEASUREMENT OF THE MARGIN OF START-STOP EQUIPMENT

(former CCIT Recommendation B.33, Brussels, 1948;

amended at Geneva, 1964 and 1980; amended at Melbourne, 1988

to incorporate former Recommendation S.33, Geneva, 1972)

The CCITT,

considering

(a) that to test the effective margin of the receiver of a start-stop teleprinter it is desirable to standardize the

content of the transmitted sequence of signals;

(b) that there is advantage in choosing a short text that can be directly printed within a single line by start-stop

terminal equipments;

employed and be arranged in a format that is easy to read and to understand;

(d) that comparison of the margin measurements obtained would be facilitated by such arrangements,

unanimously declares the view

(1) that it is not necessary to standardize an international text for the measurement of the margin of a

teleprinter;

(2) that, nevertheless, where teleprinters are required to receive information in languages based on the Latin

alphabet, one of the following texts may be used:

a) in the case of application of the International Telegraph Alphabet No. 2 (Recommendation S.1):

VOYEZ LE BRICK GEANT QUE J’EXAMINE PRES DU WHARF

THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG

b) in the case of application of the international reference version of International Alphabet No. 5, 95

character set (Recommendation T.50, Table 11 /T.50, columns 2 to 7):

VoyeZ Le BricK GeanT QuE J’ExaminE PreS Du WharF 123 456 7890 + – × : = ¤ % ( )

ThE QuicK BrowN FoX JumpS OveR ThE LazY DoG 123 456 7890 + – × : = ¤ % ( )

c) in the case of application of the international reference version of International Alphabet No. 5, 64

character set (Recommendation T.50, Table 11 /T.50, columns 2 to 5):

VOYEZ LE BRICK GEANT QUE J’EXAMINE PRES DU WHARF 123 456 7890 + – × : = ¤ % ( )

THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG 123 456 7890 + – × : = ¤ % ( )

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摘要：

ITU-T R.52 是国际电信联盟电信标准化部门（ITU-T）发布的一项技术标准，主要针对电报通信中的传输速率和信号格式进行规范。该标准定义了在电报网络中实现可靠、高效数据传输的关键参数，包括同步方式、码元结构和接口要求。ITU-T R.52 对于维护全球电报网络互操作性、保障老旧通信系统与现代数字系统兼容具有重要意义，尤其适用于需要高可靠性远距离传输的专业通信场景。了解该标准有助于电信工程师、网络规划人员及通信设备制造商确保系统符合国际规范，提升传输质量与稳定性。

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ITU-T R.52

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