The Connector Switch

The functions of the connector switch may be summarized as follows: (1) to hold all preceding switches operated until the connection is released; (2) to step the wipers to the desired line under control of the dial impulses; (3) to test the called line for busy and return busy tone if the called line is busy; (4) to extend the connection to the called line if it is idle; (5) to clear the called line of all attachments; (6) to guard both lines against intrusion by other calls; (7) to ring the called line and to return ring-back tone to the calling party, thereby indicating that the called line is being rung; (8) to remove ringing current from the called line when the called party answers; (9) to supply transmission battery to both lines; (10) to release when the call is completed and to cause the release of all other switches used in the connection.