JPS5650691A - Pilot number service system for automatic switchboard - Google Patents

Abstract

PURPOSE:To ensure a uniform distribution of the incoming calls to the extensions belonging to the same extension pilot number service group, by storing the storage position information of the extension selected precedently in accordance with the pilot number service group and at the same time controlling the storage information. CONSTITUTION:With an incoming call, the pilot number service memory reading circuit 2 delivers the extension storage position information to the pilot number service group information memory 3. And the memory 3 stores the pilot number service group information into the circuit 2. Then this information is delivered to the temporary memory 5 and the pilot number service memory 4. The memory 5 delivers the information of the memory 12 which stores the storage position information of the extension given precedently and in correspondence to the pilot number service information to the collating circuit 6. On the other hand, the memory 4 reads out one of the extension storage position information within the pilot number service group to then deliver it to the circuit 6. The circuit 6 has a collation between the information delivered from the memory 5 and the memory 4 each, and then delivers the position information of the next extension if no coincidence is obtained. And if a coincidence is obtained, the new extension storage position infor mation is read out of the memory 4 to be used for the position information of the extension to receive an incoming this time.