| 摘要 |
PURPOSE:To reduce the processing burden of a processor in each module, by performing only one time communication between processors for one call-through between transmission side and incoming side modules. CONSTITUTION:For example, an outgoing call of a caller 2A is detected at an interface circuit 3Ai, displayed on a subscriber display memory 5i, the content is read in at a processor 6i, and call analysis is made. As a result, the caller 2A connected to a signal trunk 8i via a time sharing channel 4i receives a call tone, and dial number is displayed on a service signal reception display memory 9i. The processor 6i informs an outgoing side module number to an incoming side memory 11j and is released from the connecting processing of call. After the processor 6j makes incoming call analysis for various processings, call is made. On the other hand, the end of call between the caller 2A and a called party 2B is detected by the processors 6j and 6i based on the content of subscriber line display memories 5i and 5j. Thereafter, the bus between outgoing and incoming sides is opened immediately. Thus, the number of communications between processors among modules are only once to one call to realize the economical system. |
