| 摘要 |
PURPOSE:To prevent useless call out by displaying absence and busy condition, through the display of the absence of the operator for the telephone set with the busy condition display unit, in a key answering telephone set. CONSTITUTION:When the telephone #1 is in off-hook, LED-L1 of the display unit D is illuminated with the operation of the hook switch HS, performing the busy display. Further, in the telephone set #n for which the operator is absent, the operation of the absence hold relay B is held with the absence switch BS closed and the LED-Ln of the unit D is illuminated, performing the absence display. |
