Blind people are not able to use their vision for dialling on a telephone, and rely upon tactile and audible signals.
For those who do read Braille, tactile displays will be useful, but a synthetic speech display mode would have a wider utility. Braille readers are less than 300 per million.
| Essential Features | |
|---|---|
| Enlarged keys | Dial-out buffer memory |
| Tactile key markers | Tactile Display |
| Standard key layouts | Plug-in display |
| Synthetic speech display | Key feedback - audible. |
| Desirable Features | |
| Guarded/recessed keys | Plug-in keyboard |
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