CHANNEL SWITCH DRIVING SYSTEM

PURPOSE:To adapt a spatial split type channel switch with a solid-state circuit constitution by using a triac for the channel switch and constituting the triac that it is driven directly from a channel switch driving device. CONSTITUTION:Triacs SA1-3 and SB1-3 are used as switch elements in a channel driving system of a stored program control exchange using a spatial split type multistage switch. The triacs are driven synchronizingly by the 1st- 3rd stage channel switch drivers SC1-SC3. For example, in setting a bus between an ICT (incoming trunk) and a position equipment POS, a contact (b) of the equipment POS is turned on, a gate pulse is applied from the drivers SC1- SC3 to turn on the switches SA1-3, SB1-3. Further, the switches SA1-3, SB1-3 are driven at each occasion at the polarity inversion for an MF signal transmission to other station or the like. Further, when a start confirming signal is received from a succeeding station, the switch is driven periodically to set the channel path.