The 8xDMT is designed for use in one of the following system configurations: with a POTS splitter chassis - it provisions one modem directly and is physically connected to one specific subscriber line through the POTS splitter chassis. Or without a POTS splitter chassis - it provisions one modem directly and is physically connected to one specific subscriber line through the main distribution frame (MDF) connections. The 8xDMT supports eight ADSL modem connections, converts ADSL modulation from the line into digital data streams to and from the NI-2 card and negotiates the line rate with the customer premises equipment (CPE) when it trains and bases the rate on line quality and distance.