INVERSIONAL SWITCHING SYSTEM FOR SIGNAL LINE

摘要

PURPOSE:To easily invert a signal line by arranging the pin positions symmetrically on a spot centering on the signal line requiring no inversion and turning an interface by 180 deg. after setting the interface into a connector. CONSTITUTION:The pins 400 (pin #1 and #7) requiring no inversion are set on a concentrical circle with the center of an interface 300. The pins 500 (pin #2, 4, 6 and 17) requiring inversion are set in a single direction centering on the pins 400 with a shift (d) secured from the center of the interface 300. Then the pins 500 (pin #3, 8, 20 and 24) also requiring inversion are set in the direction opposite to the other pins 500 with a shift (d) secured from the center of the interface 300. Under such conditions, a signal line connection (pin #2-2, 3-3-7-7, 1-1) of MODEM cables is secured with connection secured to the corresponding interface. Then the interface 300 is connected inversely with a 180 deg. rotation to the signal line connection (pin #2-3, 14-17, 4-8, 20-6, 7-7, 1-1) of a MODEM- MODEM connection cable.