| 摘要 |
PURPOSE:To prevent interruption of a talking voice for channel changeover at exchange by applying a digital signal to both an address before exchange and an address after exchange for a prescribed time prior to channel changeover. CONSTITUTION:The above system consists of an input terminal 1, plural channel memories 2, an output terminal 3, a write selection switch 4, a read selection switch 5, a read address counter 6, a CPU 16, and a control section 19 including an address 17 before exchange and an address 18 after exchange as address information given to the read address counter 6. Prior to cannel changeover, a digital signal is fed to both the address 17 before exchange and the address 18 after exchange for a prescribed time. Thus, the synchronization acquisition of a voice coding frame is assisted and the time division switching system not causing interruption in the talking voice at exchange is established. |
