| Arrangement of digits, letters and symbols on telephones and other devices that can be used for gaining access to a telephone network |
 |
This Recommendation has been amended to include the preferred option for showing the relationship between letters and digits, where both appear on a keypad or dial. Additionally, in order to assist blind or visually impaired people in identifying the dialling push-buttons, it has been recommended that the button with the digit "5" be marked with a tactile identifier. |
|
| Citation: |
https://handle.itu.int/11.1002/1000/5344 |
| Series title: |
E series: Overall network operation, telephone service, service operation and human factors
E.100-E.229: International operation
E.160-E.169: Numbering plan of the international telephone service |
| Approval date: |
2001-02-02 |
| Approval process: | TAP |
|
Status: |
In force |
|
Maintenance responsibility: |
ITU-T Study Group 16 |
|
Further details: |
Patent statement(s)
Development history
|
|
|
|
|
|
ITU-T Supplement
|
Title
|
Status
|
Summary
|
Table of contents
|
Download
|
|
E-100 series Suppl. 1 (02/2019)
|
ITU-T E.100 series – Framework of disaster management for disaster relief system
|
In force
|
here
|
here
|
here
|
|
E Suppl. 11 (06/2020)
|
Criteria for M2M/IoT-related assignments under Recommendation ITU-T E.164.1 and Recommendation ITU-T E.212 Annex A
|
In force
|
here
|
here
|
here
|
| Title |
Approved on |
Download |
|
Radio fequency-level based single-number indicator for mobile network usefulness for a given range of applications
|
2023
|
here
|
|
Technical Report on analysis of ITU-T F.930
|
2020
|
here
|
|
Identify call location for emergency service
|
2020
|
here
|
|
