COMPOSITE TELEPHONE SET EQUIPMENT

摘要

PURPOSE:To attain miniaturization as a whole by adopting two systems of contacts of a ten-key respectively and using one ten-key so as to attain input to a CPU and a telephone set dial IC thereby eliminating the need for a parameter setting switch to the CPU. CONSTITUTION:When the ten-key is depressed, the information is inputted simultaneously to the telephone set dial IC15 and the CPU14. That is, the ten- key 12 is constituted to attain two sets of key scannings by one contact and then the key input is given simultaneously to the telephone set dial IC15 and the CPU14.