However, calls that originate and terminate at the same switch do not use ISUP signaling. ISO is the International Standards Organization, and is devoted to the definition of standards for international and national data communications. 9001 is the current set of ISO standards. Companies whose products are ISO certified reflect a high quality of consistency and quality. 4 ISP An Internet Service Provider is a company that provides access to the Internet.
Providers typically charge a monthly fee and supply technical support and advice to customers.
ITU A committee of the International Telecommunications Union that recommends international standards for radio, television, and telecommunication signals. ITU Grid In DWDM systems, an assignment of standard wavelengths. ITU-Radio Standards Sector Formerly Consultative Committee for International Radio. The permanent committee of the International Telecommunications Union that recommends international standards for radio and television signals. A disconnect is defined as the breaking or release of a circuit connecting two telephones or data devices, an idle disconnect is a disconnect that occurs when no data is transmitted on a link in a specified amount of time.