ITU-T E.180-1998
Technical Characteristics of Tones for the Telephone Service - Series E: Overall Network Operation Telephone Service Service Operation and Human Factors - Operation Numbering Routing and Mobile Services - International Operation - Tones in National Signal

Standard No.

ITU-T E.180-1998

Release Date

1998

Published By

International Telecommunication Union (ITU)

Latest

ITU-T E.180-1998

Scope

In this Recommendation, the expression "Administration" is used for conciseness to indicate both a telecommunication administration and a recognized operating agency.

ITU-T E.180-1998 history

• 1998 ITU-T E.180-1998 Technical Characteristics of Tones for the Telephone Service - Series E: Overall Network Operation Telephone Service Service Operation and Human Factors - Operation Numbering Routing and Mobile Services - International Operation - Tones in National Signal