| 摘要 |
PURPOSE:To form multi-trunk line multi-terminal conference even from a multi- trunk line conference or multi-terminal conference by providing a connection control means controlling a cross-point based on a connection instruction outputted from a key telephone set at each set and a signal outputted from a judging means, and connecting the key telephone set and other telephone sets. CONSTITUTION:A main control section functions as connecting control means 221, 222, ..., 22x controlling a cross-point 5 based on a connection means and judging means outputted from key telephone sets 21, 22, ..., 2x to connect the key telephone sets and other telephone sets, and judging means 211, 212, ..., 21x detecting a prescribed key operation of each key telephone sets 21, 22, ..., 2x and judging whether a conference forming start instruction or a conference forming end instruction. When the connection control means receives a signal outputted by the discrimination of the judging means to be the conference forming end instruction, the connecting control means reads the connecting state data from storage means 231, 232, ..., 23x and synthesizes the connecting state obtained from the conference forming start instruction to the conference forming end instruction with the connecting state before the conference forming start command. |
