A standard ITU-T E.161 keypad used for text messaging.

E.161 is an ITU-T recommendation which defines the assignment of the basic 26 Latin letters (a to z) to the 12-key telephone keypad. This is used in multi-tap and predictive text systems.

ETSI 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 and has led to a variety of inconsistent solutions for European languages.^[1]

[edit] See also

• E.164

[edit] References

[edit] Further reading

• Character Repertoires, Ordering and Assignment to the 12-key Telephone Keypad for European Languages and Languages Used in Europe.

[edit] External links

• E.161 Arrangement of digits, letters and symbols on telephones and other devices