Circuit for interconnecting a number of calling lines
First Claim
1. AN AUTOMATIC TELEPHONE SYSTEM FOR INTERCONNECTING A PLURALITY OF CALLING LINES INCLUDING A FIRST GROUP OF TERMINALS HAVING A FIRST NUMBER DESIGNATION, A SECOND GROUP OF TERMINALS HAVING A SEDOND NUMBER DESIGNATION, CONNECTING MEANS PERMANENTLY COUPLING SAID TERMINALS TO PERMIT COMMUNICATION THEREBETWEEN, MEANS RESPONSIVE TO AN IDLE CONDITION ON SAID FIRST GROUP OF TERMINALS AND THE TRANSMISSION OF SIGNALS REPRESENTING SAID FIRST NUMBER DESIGNATION FOR CONNECTING A CALLING LINE TO SAID FIRST TERMINALS, MEANS FOR SUPPLYING RINGING CURRENT TO SAID FIRST TERMINALS, IMPEDANCE MEANS CONNECTED TO SAID TERMINALS AND ADAPTED TO PRESENT A RELATIVELY LOW IMPEDANCE TO DIRECT-CURRENT SIGNALS AND A RELATIVELY HIGH IMPEDANCE TO ALTERNATINGCURRENT SIGNALS FOR TRIPPING SAID RINGING MEANS, AND MEANS RESPONSIVE TO THE TRIPPING SAID RINGING MEANS FOR TRANSMITTING A SIGNAL TO SAID CALLING LINE REPRESENTING A REVENUE CHARGE INDICATION.
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Citations
1 Claim
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1. AN AUTOMATIC TELEPHONE SYSTEM FOR INTERCONNECTING A PLURALITY OF CALLING LINES INCLUDING A FIRST GROUP OF TERMINALS HAVING A FIRST NUMBER DESIGNATION, A SECOND GROUP OF TERMINALS HAVING A SEDOND NUMBER DESIGNATION, CONNECTING MEANS PERMANENTLY COUPLING SAID TERMINALS TO PERMIT COMMUNICATION THEREBETWEEN, MEANS RESPONSIVE TO AN IDLE CONDITION ON SAID FIRST GROUP OF TERMINALS AND THE TRANSMISSION OF SIGNALS REPRESENTING SAID FIRST NUMBER DESIGNATION FOR CONNECTING A CALLING LINE TO SAID FIRST TERMINALS, MEANS FOR SUPPLYING RINGING CURRENT TO SAID FIRST TERMINALS, IMPEDANCE MEANS CONNECTED TO SAID TERMINALS AND ADAPTED TO PRESENT A RELATIVELY LOW IMPEDANCE TO DIRECT-CURRENT SIGNALS AND A RELATIVELY HIGH IMPEDANCE TO ALTERNATINGCURRENT SIGNALS FOR TRIPPING SAID RINGING MEANS, AND MEANS RESPONSIVE TO THE TRIPPING SAID RINGING MEANS FOR TRANSMITTING A SIGNAL TO SAID CALLING LINE REPRESENTING A REVENUE CHARGE INDICATION.
Specification
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Current AssigneeLester Hochgraf
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Original AssigneeLester Hochgraf
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InventorsLESTER HOCHGRAF
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Application NumberUS03/858,924Time in Patent Office1,971 DaysField of SearchUS Class Current379/211.02CPC Class CodesH04Q 3/00 Selecting arrangements H04Q...
