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This Recommendation contains a set of guidelines for the design of user instructions for public telecommunications terminals. These guidelines are grouped into three main categories: general guidelines, guidelines for fixed (printed) instructions and guidelines for dynamic (displayed) instructions. An example of how the guidelines may be implemented is provided in Annex A.
| Author | ITU |
|---|---|
| Editor | ITU |
| Document type | Standard |
| Format | File |
| ICS | 33.050.10 : Telephone equipment
|
| Number of pages | 14 |
| Year | 1990 |
| Document history | |
| Country | International |
| Keyword | CCITT E.137;ITU-T 137;137;ITU-T E.137 |