Communication switching system

Claim 1

A COMMUNICATION SWITCHING SYSTEM COMPRISING: A SWITCHING NETWORK HAVING TWO SIDES, A PLURALITY OF TERMINATING UNITS CONNECTED TO SAID NETWORK, EACH TERMINATING UNIT HAVING AN APPEARANCE ON BOTH SIDES OF THE NETWORK, A MARKER APPARATUS FOR CONTROLLING THE ESTABLISHMENT OF CONNECTIONS BETWEEN ANY TWO OF SAID TERMINATING UNITS VIA SAID NETWORK, A PLURALITY OF LINES CONNECTED TO INDIVIDUAL ONES OF CERTAIN OF SAID TERMINATING UNITS, A PLURALITY OF REGISTER MEANS ASSOCIATED WITH INDIVIDUAL ONES OF OTHER OF SAID TERMINATING UNITS, A PLURALITY OF SENDER MEANS ASSOCIATED WITH INDIVIDUAL ONES OF STILL OTHERS OF SAID TERMINATING UNITS, COMMON TRANSLATING MEANS; MEANS RESPONSIVE TO A CALLING LINE SERVICE REQUEST SIGNAL FROM A FIRST OF SAID LINES TO IDENTIFY THE CALLING-LINE TERMINATING UNIT AND MEANS INCLUDING THE MARKER APPARATUS TO CAUSE A CONNECTION TO BE ESTABLISHED THROUGH SAID NETWORK BETWEEN THE TERMINATING UNIT OF THE CALLING LINE AND THE TERMINATING UNIT OF ONE OF SAID REGISTER MEANS; MEANS TO RECEIVE CALL SIGNALS DESIGNATING THE CALLED LINE DIRECTORY NUMBER AS TRANSMITTED OVER SAID FIRST LINE VIA SAID REGISTER TERMINATING UNIT, AND MEANS TO TRANSLATE UNDER THE CONTROL OF SAID TRANSLATING MEANS AT LEAST A PART OF SAID DIRECTORY INFORMATION INTO CORRESPONDING EQUIPMENT LOCATION INFORMATION WHICH INCLUDES THE IDENTITY OF A SECOND ONE OF SAID LINE TERMINATING UNITS;