进入这个网址
http://www.itu.int/publications/online/index.html

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 Individual ITU-T Recommendations

A Organization of the work of ITU-T B Means of expression: definitions, symbols, classification C General telecommunication statistics D General tariff principles E Overall network operation, telephone service, service operation and human factors F Non-telephone telecommunication services G Transmission systems and media, digital systems and networks H Audiovisual and multimedia systems I Integrated services digital network J Cable networks and transmission of television, sound programme and other multimedia signals K Protection against interference L Construction, installation and protection of cables and other elements of outside plant M TMN and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits

N Maintenance: international sound programme and television transmission circuits O Specifications of measuring equipment P Telephone transmission quality, telephone installations, local line networks Q Switching and signalling R Telegraph transmission S Telegraph services terminal equipment T Terminals for telematic services U Telegraph switching V Data communication over the telephone network X Data networks and open system communications Y Global information infrastructure and Internet protocol aspects Z Languages and general software aspects for telecommunication systems

以ITU-T Recommendations 为例
进入后如下
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A
Organization of the work of ITU-T
B
Means of expression: definitions, symbols, classification
C
General telecommunication statistics
D
General tariff principles
E
Overall network operation, telephone service, service operation and human factors
F
Non-telephone telecommunication services
G
Transmission systems and media, digital systems and networks
H
Audiovisual and multimedia systems
I
Integrated services digital network
J
Transmission of television, sound programme and other multimedia signals
K
Protection against interference
L
Construction, installation and protection of cables and other elements of outside plant
M
TMN and network maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits
N
Maintenance: international sound programme and television transmission circuits
O
Specifications of measuring equipment
P
Telephone transmission quality, telephone installations, local line networks
Q
Switching and signalling
R
Telegraph transmission
S
Telegraph services terminal equipment
T
Terminals for telematic services
U
Telegraph switching
V
Data communication over the telephone network
X
Data networks and open system communication
Y
Global information infrastructure and internet protocol aspects
Z
Languages and general software aspects for telecommunication systems

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以查找V。92协议为例
点击“V”，出现：
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Data communication over the telephone network
V.1
Equivalence between binary notation symbols and the significant conditions of a two-condition code

V.2
Power levels for data transmission over telephone lines

V.4
General structure of signals of international alphabet No. 5 code for character oriented data transmission over public telephone networks

V.5
Standardization of data signalling rates for synchronous data transmission in the general switched telephone network

V.6
Standardization of data signalling rates for synchronous data transmission on leased telephone-type circuits

V.7
Definitions of terms concerning data communication over the telephone network

V.8
Procedures for starting sessions of data transmission over the public switched telephone network




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V.91
A digital modem operating at data signalling rates of up to 64 000 bit/s for use on a 4-wire circuit switched connection and on leased point-to-point 4-wire digital circuits

V.92
Enhancements to Recommendation V.90

V.100
Interconnection between public data networks (PDNs) and the public switched telephone networks (PSTN)

V.110
Support by an ISDN of data terminal equipments with V-Series type interfaces







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出现如下画面
Recommendation V.92

Approved in 2000-11



In force components  
Number
Title Status
V.92 (11/00)
  Enhancements to Recommendation V.90
In force

V.92 Amendment 1 (07/01)
  ITU-T Amendment 1 (07/01) to Recommendation V.92 - Enhancements to Recommendation V.90
In force

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点击V.92，选择要下载的格式后出现如下画面：
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Welcome to the ITU Electronic Bookshop
This service provides you with the opportunity to purchase one or several of the International Telecommunication Union's publications which have been made available in their electronic format.

Click here if you are a first-time user and need to know more about the Electronic Bookshop OR
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选择第二项，输入你的EMAIL，填好一些东西（乱填）。接着查看你的信箱

找到密码，再回到以上画面选择第三项，进去。输入你的用户名和密码就可以下载了。

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  ITU是International Telecommunication Union (国际电信联盟)的英文缩写。该组织是为了全球各成员国或地区之间进行电信事业发展和通信合理使用的合作而成立的。其工作主要分为三个部分：ITU-R 为无线通信部分，工作目的是确保合理、公平、有效、经济地使用频谱和卫星轨道资源。ITU-T 为电信标准化部分，ITU-D为电信发展部分。

     各种ITU会议所产生的文献有：会议录、建议书、白色文件(会议文稿)、手册、导则等。ITU-T的建议是集中有关意见，由各相关部门自愿接受的标准。ITU-R的建议是命令,由各主权国家在法律上接受。与ITU-R建议保持一致,是国际法的要求。ITU-D的建议则是提供成功的经验，供发展中国家参考。

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