| 摘要 |
PURPOSE:To reduce the number of conference trunks, by using the night B board, which is switched at night, as a conference trunk for B board which is used in daylight. CONSTITUTION:In respect to the switching (PASS switching) of a network NW in case of connection of the conference trunk of the time division multiple switching system to the B board, the rewrite of a memory for switching control fixes the assignment of time slots among CFT-ATT of a high frequency and makes a specific position of the time slot for the night B board variable only at a switching time for night to use the night B board as a conference trunk for the general B board, and thus, a private conference trunk for the night B board is unnecessary. |
