| 摘要 |
PURPOSE:To secure the mutual pickup of the incoming call among the attendant boards by transferring for memorization the information of the incoming call memorized temporarily to the call-back circuit of other attendant board, thus enhancing the service to the incoming call. CONSTITUTION:The incoming call arriving at trunk TRK from the main wire is memorized in, for example, call-back units CP0-CPn of attendant board ATT0. Then the number to unit CP memorized plus the number of board ATT possessing the CP are dialed with the declaration of intension in order to select the incoming call or the retained call which are memorized temporarily in units CP0-CPn of board ATT0 and other board ATT each. And the CPU detects the dialing. Then the information is transferred to unit CP of board ATT0 which had the declaration of intension, and at the same time the call infrmation memorized in unit CP of selected board ATT is erased. In such way, the mutual pickup of the incoming call is given among attendant boards, thus enhancing the service to the incoming call. |
