Furthermore, many severely visually impaired and blind people prefer having the keypad at eye level, e.g. mounted on the wall. This telephone has 10 numbers with direct dialing and a redialing memory. People with muscle dystrophy or tetraplegia may have reduced strength of finger movements. These buttons may even be operated with a mouth stick, as demonstrated in Figure 17.2. The round desk can be turned to three different positions with an electric motor operated by buttons on the telephone via an environmental control unit.
Similar telephones are available in other countries.
4 Optional Built-in Features in Analogue Telephones Number memory and redialing are common useful features. People with intellectual impairment do not have to remember the full telephone number. Generally, it is necessary to finish dialing within a limited time span. For elderly people, the time span allowed for dialing may be too short and in this case the number memory facilitates the dialing of frequently used numbers. The transmission characteristics will accommodate automatically to different line conditions, which especially is needed for long distance calls.