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ITU-T E.161 (02/2001)

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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: http://handle.itu.int/11.1002/1000/5344
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
Ed. ITU-T Recommendation Status Summary Table of Contents Download
12.1 E.161 (2001) Amd. 1 (06/2014) In force
here
- here
12 E.161 (02/2001) In force
here
here
here
11 E.161 (05/1995) Superseded -
here
here
10 E.161 (03/1993) Superseded - - here
9 E.161 (11/1988) Superseded -
here
here
8 E.161/Q.11 (10/1984) Superseded - - Not available
7 E.161/Q.11 (11/1980) Superseded - - Not available
6 E.161/Q.11 (10/1976) Superseded - - Not available
5 E.161/Q.11 (12/1972) Superseded - - Not available
4 E.161/Q.11 (10/1968) Superseded - - Not available
3 E.29/Q.11 (06/1964) Superseded - - Not available
2 E.29/Q.11 (12/1960) Superseded - - Not available
1 E.29 (11/1958) Superseded - - Not available