AXE

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TELEPHONE DATA SWITCHING SYSTEMS COMPRISING A SUBSCRIBER SWITCH AND CONTROLLER, A GROUP SWITCH AND CONTROLLER, A TRUNK LINE SUPERVISOR AND SIGNALLER, A COMMON CHANNEL SIGNALLER, A MOBILE TELEPHONE CONNECTION CONTROLLER, AN OPERATOR CONNECTION CONTROLLER, A REGIONAL PROCESSOR, A CENTRAL PROCESSOR, TERMINALS, PRINTERS, DISPLAYS, MAINTENANCE UNITS, PROCESSOR TEST UNITS AND COMPUTER PROGRAMS THEREFOR