| 摘要 |
PURPOSE:To perform the function setting easily even on the actual location and simplify its change and maintenance, by collecting concentratedly all constituting elements, which are required for the function setting of a key telephone device and its confirmation, on a print substrate incorporated in a main device box body. CONSTITUTION:A microcomputer 3, an ROM4 for program, an external RAM5, an RAM6 for function setting, a power source 7 for backup, a register switch 10, an LED11 for register number display, a switch 13 for setting, and an LED12 for bit display are mounted on a print substrate 2. This print substrate 2 is set in a box body 1 of the main device of the key telephone, thereby performing the function setting easily even on the actual location and simplifying its change and maintenance. |
