Terminal equipment for telecommunications and information processing

Terminal equipment for telecommunications and information processing which has a human-machine interface and a metallic telecommunications interface, the terminal equipment comprising:

• a first common-mode rejection filter disposed at a connection point to the human-machine interface, having a first high-frequency junction point to which unwanted high-frequency components of interface signals thereof are directed;
• a second common-mode rejection filter disposed at a connection point to the metallic telecommunications interface, having a second high-frequency junction point to which unwanted high-frequency components of interface signals thereof are directed;
• and
• a distributed-constant transmission line having two conductors, one of said conductors being used for interconnection between the first high-frequency junction point of said first common-mode rejection filter and the second high-frequency junction point of said second common-mode rejection filter, the other one of said conductors being connected to a frame ground or a signal ground of the terminal equipment.

Terminal equipment for telecommunications and information processing which has a human-machine interface and a metallic telecommunications interface, the terminal equipment comprising:

• a first common-mode rejection filter disposed at a connection point to the human-machine interface, having a first high-frequency junction point to which unwanted high-frequency components of interface signals thereof are directed;
• a second common-mode rejection filter disposed at a connection point to the metallic telecommunications interface, having a second high-frequency junction point to which unwanted high-frequency components of interface signals thereof are directed;
• and
• a series resonance circuit for interconnecting the first high-frequency junction point of said first common mode rejection filter and the second high-frequency junction point of said second common-mode rejection filter, impedance of said series resonance circuit being minimum at a particular disturbance frequency generated by an external noise source or at a particular spurious frequency generated by an internal noise source.

Terminal equipment for telecommunications and information processing which has a human-machine interface and a metallic telecommunications interface, the terminal equipment comprising:

• a first shielded cable for the human-machine interface, having a first high-frequency junction point to which unwanted high-frequency components of interface signals thereof are directed;
• a second shielded cable for the metallic telecommunications interface, having a second high-frequency junction point to which unwanted high-frequency components of interface signals thereof are directed;
• a first common-mode choke coil disposed at a connection point of the human-machine interface;
• a second common-mode choke coil disposed at a connection point of the metallic telecommunications interface;
• and
• a bypass circuit for interconnecting a first shield conductor of said first shielded cable and a second shield conductor of said second shielded cable.

Terminal equipment for telecommunications and information processing which has a human-machine interface and a metallic telecommunications interface, the terminal equipment comprising:

• a first shielded cable for the human-machine interface, having a first high-frequency junction point to which unwanted high-frequency components of interface signals thereof are directed;
• a second shielded cable for the metallic telecommunications interface, having a second high-frequency junction point to which unwanted high-frequency components of interface signals thereof are directed;
• a first common-mode choke coil disposed at a connection point of the human-machine interface;
• a second common-mode choke coil disposed at a connection point of the metallic telecommunications interface;
• and
• a distributed-constant transmission line having two conductors, one of said two conductors being used for interconnection between a first shield conductor of said first shielded cable and a second shield conductor of said second shielded cable, the other one of said two conductors being connected to a frame ground or a signal ground of the terminal equipment.

Terminal equipment for telecommunications and information processing which has a human-machine interface and a metallic telecommunications interface, the terminal equipment comprising:

• a first shielded cable for the human-machine interface, having a first high-frequency junction point to which unwanted high-frequency components of interface signals thereof are directed;
• a second shielded cable for the metallic telecommunications interface, having a second high-frequency junction point to which unwanted high-frequency components of interface signals thereof are directed;
• a first conmmon-mode choke coil disposed at a connection point of the human-machine interface;
• a second common-mode choke coil disposed at a connection point of the metallic telecommunications interface;
• and
• a series resonance circuit for interconnecting a first shield conductor of said first shielded cable and a second shield conductor of said second shielded cable, impedance of said series resonance circuit being minimum at a particular disturbance frequency generated by an external noise source or at a particular spurious frequency generated by an internal noise source.

Terminal equipment for telecommunications and information processing which has a human-machine interface and a metallic telecommunications interface, the terminal equipment comprising:

• a first common-mode rejection filter having a discharge element, disposed at a connection point of the human-machine interface, having a first high-frequency junction point to which unwanted high-frequency components of interface signals thereof are directed;
• a second common-mode rejection filter having a discharge element, disposed at a connection point of the metallic telecommunications interface, having a second high-frequency junction point to which unwanted high-frequency components of interface signals thereof are directed;
• and
• a bypass circuit for interconnecting the first high frequency junction point of said first common-mode rejection filter and the second high-frequency junction point of said second common-mode rejection filter.

Terminal equipment for telecommunications and information processing which has a human-machine interface and a metallic telecommunications interface, the terminal equipment comprising:

• a first common-mode rejection filter having a discharge element, disposed at a connection point of the human-machine interface, having a first high-frequency junction point to which unwanted high-frequency components of interface signals thereof are directed;
• a second common-mode rejection filter having a discharge element, disposed at a connection point of the metallic telecommunications interface, having a second high-frequency junction point to which unwanted high-frequency components of interface signals thereof are directed;
• and
• a distributed-constant transmission line having two conductors, one of said two conductors being used for interconnection between the first high-frequency junction point of said first common-mode rejection filter and the second high-frequency junction point of said second common-mode rejection filter, the other one of said two conductors being connected to a frame ground or a signal ground of the terminal equipment.