| 摘要 |
PURPOSE:To eliminate the need for recalling by using a telephone transfer device provided with a coupling relay opening a caller line and closing an incoming line when a transfer destination telephone set is hooked on during three party call. CONSTITUTION:When either a caller telephone set 11' or a transfer destination telephone set 12' is hooked on during a three-party call, only a relay contact 13 or 14 of on-hook side is turned on and only the telephone line of hook-on side is opened and the telephone line not hooked on remains closed. Thus, if either a calling telephone set A or a transfer destination telephone set E is finished earlier, when the handset is hooked on, the talking is kept without hindrance.
|
