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- E.161 abstract "E.161 is an ITU-T recommendation that defines the assignment of the basic 26 Latin letters (A to Z) to the 12-key telephone keypad. Uses for this mapping include: Multi-tap and predictive text systems Forming phonewords from telephone numbers Using alphabetic characters (e.g. as a mnemonic) in a personal identification numberETSI ETS 300 640 and ISO 9995-8 also address this. Language-specific letters (e.g. ü, é, å, ä, ö) as well as other characters (e.g. ‘€’ or ‘@’) are not addressed, which has led to a variety of inconsistent solutions for European languages.The E.161 layout is primarily based on the layout used on American telephones since the 1930s for telephone exchange names. Until the 1990s, Q and Z were not included in the standard layout, and since the letters served mainly as mnemonic devices, they were not necessary (Q and Z were not used in phonewords); telephones either omitted them, placed Q and Z onto the 1 key, or included Q and Z on the current locations, with PRS on 7 and with WXY on 9, respectively. The development of text messaging on mobile phones, which required the full range of the alphabet, led to the need to standardize locations for Q and Z on mobile devices. E.161 adopted the current layout in response to this.".
- E.161 thumbnail Telephone-keypad.svg?width=300.
- E.161 wikiPageExternalLink en.
- E.161 wikiPageID "16752353".
- E.161 wikiPageRevisionID "551708464".
- E.161 hasPhotoCollection E.161.
- E.161 subject Category:ITU-T_recommendations.
- E.161 subject Category:Identifiers.
- E.161 subject Category:Telephone_numbers.
- E.161 comment "E.161 is an ITU-T recommendation that defines the assignment of the basic 26 Latin letters (A to Z) to the 12-key telephone keypad. Uses for this mapping include: Multi-tap and predictive text systems Forming phonewords from telephone numbers Using alphabetic characters (e.g. as a mnemonic) in a personal identification numberETSI ETS 300 640 and ISO 9995-8 also address this. Language-specific letters (e.g. ü, é, å, ä, ö) as well as other characters (e.g.".
- E.161 label "E.161".
- E.161 sameAs m.0404_bh.
- E.161 sameAs Q5321561.
- E.161 sameAs Q5321561.
- E.161 wasDerivedFrom E.161?oldid=551708464.
- E.161 depiction Telephone-keypad.svg.
- E.161 isPrimaryTopicOf E.161.
