SIGNAL SYNCHRONIZATION CONTROL SYSTEM FOR ATM SWITCHBOARD

摘要

PURPOSE:To evade the disapperance of signals and to secure the multiconnection service even if the arriving sequence of the call and connection control signals is different from a prescribed sequence. CONSTITUTION:When a connection control signal B-SETUP is received by a signal processing part 21 before a call control signal C-SETUP, a control part starting part 31 stores the signal B-SETUP in a signal buffer 31a. Then the part 31 receives the signal C-SETUP and starts a call control part 32a and then a connection control part 33a to transfer the signal B-SETUP stored in the buffer 31a to the part 33a. Then the part 31 carries out the processings in a prescribed sequence (a). Meanwhile the part 33a is provided with a monitoring function part 34a to monitor the starting of the part 32. Then the signals are transferred in a prescribed sequence after the starting of the part 32a is confirmed (b).