PACKAGE DRAWWOUT INFORMATION SYSTEM

摘要

PURPOSE:To inform the operator of the telephone exchange that the unmounted package has been drawn out by the control signal sent from the control unit in case the terminal unit such as the trunk of the digital telephone exchange features the electronic package structure. CONSTITUTION:The clock pulse is supplied to register 102 by strobe signal 106 sent from the control unit plus package designation signal 107 and via NOR gate 103, and data 105 is set to register 102. Signal 107 is transmitted only to one package among plural units of trunks 101. As a result, the control unit can give the identification between the mounted and unmounted states of the package just by having the supervisory for the presence or absence of the package designation signal which is sent back via line 108 to which the output of buffers 104 of trunks 101 are connected mutually.