SWITCHING SYSTEM EQUIPPED WITH LINE VERIFICATION APPARATUS

摘要

An arrangement for verifying the accuracy of connections of customer lines to an electronic switching system which is a replacement for an existing switching system is disclosed. More specifically, an electronic switching system is disclosed comprising one or more test trunk circuits, each connected by means of a "no-test" trunk to the existing switching system. Each of the test trunk circuits comprises testing means for performing selected tests in response to commands from the electronic switching system. Included in the testing means are means to detect the busy/idle state of a customer line and means for testing a busy line for proper connection to the electronic switching system.