ITU

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ITU-T Recommendations

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Individual Recommendations (Direct download or purchase)

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

Telecommunication management, including TMN and network maintenance

N

Maintenance: international sound programme and television transmission circuits

O

Specifications of measuring equipment

P

Terminals and subjective and objective assessment methods

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, open system communications and security

Y

Global information infrastructure, Internet protocol aspects and next-generation networks

Z

Languages and general software aspects for telecommunication systems