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ITU G.992.5 is an ITU (International Telecommunication Union) standard, also referred to as ADSL2+. This extends the capability of basic ADSL by doubling the number of downstream bits. The data rates can be as high as 24 Mbit/s downstream and 1 Mbit/s upstream depending on the distance from the DSLAM to the customer's home.
ADSL2+ is a hot topic because it is capable of doubling the transmission speed of typical ADSL connections from 1.1 MHz to 2.2 MHz. This doubles downstream data rates to over 20 Mbit/s, but these data speed rates will only be attainable on loops shorter than 8,000 feet (2.4 kilometres).
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