| 摘要 |
PURPOSE:To realize the general connection just through operation of three units of buttons by providing the cursor lamp featuring the 1:1 correspondence to the function display part, one unit of the operation button plus two units of the cursor buttons. CONSTITUTION:Cursor lamp CL featuring the 1:1 correspondence to function display part FD, two units of cursor button CSB which shifts the lighting of CL plus one unit of operation button AB to give the operation indication are installed to the B board of the private branch exchange. At the connection time, button CSB is operated, and then button AB is pressed when lamp CL corresponding to part FD displays the desired function. Thus the desired connection completes. The lighting of lamp CL is given by the repetitive operation of button CSB. In such way, only three units of buttons are used to facilitate the operation for the general connection. |
