POLING ACCESS METHOD IN MULTIPLEX TRANSMISSION CONTROL SYSTEM AND APARTMENT MONITORING CALLING SYSTEM USING THE METHOD

摘要

PURPOSE: To attain multiplex transmission also to a connection terminal equipment added after starting system operation without resetting the system by executing multiplex transmission control while repeating poling access to free addresses after starting system operation. ;CONSTITUTION: At the time of resetting the system, addresses previously reserved and allocated to a terminal equipment Tn are successively specified from a main controller 1 to execute poling accesses for initialization and addresses '0001', '0004', '0005', '0007' from which response signals are returned are judged as occupied addresses to start system operation. After starting the system, multiplex transmission control is executed while repeatedly executing poling accesses also to free addresses. Consequently the multiplex transmission control can be applied also to a terminal equipment '0003' additionally connected to a multiplex signal line LC after starting the operation from a point of time When the connection is discriminated without resetting the system.;COPYRIGHT: (C)1993,JPO&Japio