Through analysis on the disability of deaf mute and regular phones,we quoted the idea of "barrier-free design",and adopted the indicator light.Meanwhile,the barrier-free transformation between sound and characters and the design of speed dial enable the deaf mute communicate with others freely by regular phones in order to show a human-care design.
Physical defects on the deaf person and telephone landlines in the analysis, reference to "barrier-free design" concept, with light tips, voice and text conversion and a key to dial accessible way, making use of telephone landlines accessible deaf people exchange, reflecting the design of a kind of human caring.