This page will soon be deactivated—explore our new, faster, mobile-friendly site, now centralized in MyWorkspace!

Connecting the world and beyond

  •  
WTPF 2026

ITU-T Recommendations

Search by number:
Others:
Skip Navigation Links
Content search
Advanced search
Provisional name
Equivalent number
Formal description
Study Groups tree viewExpand Study Groups tree view

ITU-T E.121 (06/2004)

عربي | 中文 | English | Español | Français | Русский
Pictograms, symbols and icons to assist users of the telephone and telefax services
The purpose of this Recommendation is to identify pictograms, symbols and icons that could be used to aid users in the identification of services available and then in the use of such services. The revisions to this Recommendation include new symbols and pictograms, developed in close collaboration with the International Electrotechnical Commission (IEC).
Citation: https://handle.itu.int/11.1002/1000/7372
Series title: E series: Overall network operation, telephone service, service operation and human factors
  E.100-E.229: International operation
  E.120-E.139: General provisions concerning users
Approval date: 2004-06-29
Approval process:AAP
Status: In force
Observation:This edition includes the changes introduced by Erratum 1 (10/2004).
Maintenance responsibility: ITU-T Study Group 21
Further details: Patent statement(s)
Development history