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ADSL Max
ADSL Max is a cover term for the UK telco BT's range of commercial ADSL services that were rate-adaptive and deployed over phone lines. BT's ADSL Max services were launched in March 2006, however ADSL Max, and the back-end IP Stream platform were formally retired in June 2014.
ADSL Max has been replaced by a new service Wholesale Broadband Connect.
== Rate-adaptive service ==
Rate-adaptive services were intended to offer the best possible speed attainable, which could vary over time. The maximum speed permitted was determined by current line conditions, the level of noise, and also by recent history based on factors including the rate of communications errors and the best and worst DSL modem sync speeds achieved during some recent period of time. The highest speed ADSL Max services enabled customers to receive up to 7.15 Mbit/s (termed 'downstream') over a standard BT telephone line of sufficient quality. Various kinds of lower speed rate-limited adaptive services were also available as a reduced cost option. Customers with long lines, poor quality lines or who experienced high levels of noise or interference were limited to much slower transfer rates, and some customers whose lines are very poor or who are affected by high levels of noise may have been unable to obtain service at all.〔("BT IPStream Max Handbook v7" ), BT Wholesale website. Retrieved on 2009-06-04.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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