ITU-T E.137-1997
User Instructions for Payphones - Series E: Overall Network Operation Telephone Service Service Operation and Human Factors Operation Numbering Routing and Mobile Services - International Operation - General Provisions Concerning Users Study Group 2; 15 p

Standard No.

ITU-T E.137-1997

Release Date

1997

Published By

International Telecommunication Union (ITU)

Latest

ITU-T E.137-1997

Scope

This Recommendation contains a set of guideline principles for the design of user instructions for public telecommunications terminals, particularly as applied to payphones. These instructions may be mounted on or next to the terminal, or may be presented

ITU-T E.137-1997 history

• 1997 ITU-T E.137-1997 User Instructions for Payphones - Series E: Overall Network Operation Telephone Service Service Operation and Human Factors Operation Numbering Routing and Mobile Services - International Operation - General Provisions Concerning Users Study Group 2; 15 p