ATIS Telecom Glossary

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International Organization for Standardization (ISO)

An international organization that (a) consists of member bodies that are the national standards bodies of most of the countries of the world, (b) is responsible for the development and publication of international standards in various technical fields, after developing a suitable consensus, (c) is affiliated with the United Nations, and (d) has its headquarters at 1, rue de Varembé,… (Read More →)

international prefix

The combination of digits to be dialed by a calling subscriber making a call to a subscriber in another country to obtain access to the automatic outgoing international equipment. [T
1. Rpt30-1994]

international routing code

A 3-digit code within the North American numbering plan, beginning with 1, that classifies international calls as requiring either regular or special handling. [T1.104-1988]

International System of Units (SI)

The modern form of the metric system, which has been adopted by the United States and most other nations.
Note: The SI is constructed from seven base units for independent physical quantities. Tables showing these values are included below and are current as of Fall
199
5. SI Prefixes. The common metric prefixes are: Multiplication FactorPrefix NamePrefix Symbol1 000 000… (Read More →)

International Telecommunication Union (ITU)

A civil international organization established to promote standardized telecommunications on a worldwide basis.
Note: The ITU-R and ITU-T are committees under the ITU. The ITU headquarters is located in Geneva, Switzerland. While older than the United Nations, it is recognized by the U. N. as the specialized agency for telecommunications.

International Telecommunication Union – Radio (ITU-R)

The Radiocommunications Sector of the International Telecommunication Union (ITU); responsible for studying technical issues related to radiocommunications, and having some regulatory powers.
Note: A predecessor organization was the CCIR.

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