8.4.1: Numeric keys

Where provided, physical numeric keys arranged in a rectangular keypad layout shall have the number five key tactilely distinct from the other keys of the keypad.

Notes

Recommendation ITU‑T E.161 [i.20] describes the 12-key telephone keypad layout and provides further details of the form of tactile markers.

Testing methods

Type of complianceInspection
Pre-conditions
  1. The ICT has physical numeric keys arranged in a 12-key telephone keypad layout.
Procedure
  1. Check that the number five key is tactilely distinct from the other keys of the keypad.
Result Pass: Check 1 is true
Fail: Check 1 is false

 

Requirement details

Reference number: 8.4.1

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No related technical requirements are associated with this technical requirement