With regard to the problem of collecting energy, we need to calculate the energy is transmitted on line. There are differences in the level of the voltage between the rear link, in which the standard 10Base-T, 100Base-TX and 1000Base-T have varying voltage is 5V, 2V and 2V. Resistance on all on-line is 100R. According to preliminary calculations, the energy of the Mekong linking is 250mW, 40mW and 40mW. However, in order to calculate more precisely the energy of each to the bit, based on the bits to ' 0 ' and ' 1 ' bits for each of the standard links. In 10Base-T standard, the voltage is kept at + 2.5 V or 2.5 V so-energy always at 6.25 nJ. 100Base-TX standard, only bit 1 is there voltage (+ 1V or-1) so the energy obtained can be 0 (for bit 0) or 80nJ (for bit 1). For 1000Base-T standard, so is 2 bit per pulse should now be 4 voltage level is-1,-0.5, 0.5 and + 1V. The level of the voltage 0V is used for error messages. So, energy level for this benchmark can be 20nJ or 80nJ.
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