1. A method of controlling an operational line in a DSL system, the method comprising: constructing a Hidden Markov Model (HMM) to model one or more internal states of the DSL system, the states characterizing at least one of data activity, impulse noise, crosstalk, noise margin, maximum attainable data rate or bit distributions; collecting update operational data from the operational line; analyzing the collected update operational data, the analyzing farther comprising: estimating an observation probability, a state-transition probability matrix, and an initial state distribution of the HMM based on the collected update operational data; estimating a likelihood of at least one state of the HMM based on the collected update operational data; and controlling operation of the DSL system based on the constructed HMM and analyzed update operational data, the controlling further comprising: determining control parameters based on the estimated likelihood of at least one state of the HMM; and modifying operation of the operational line through application of the determined control parameters to reflect the information available from the HMM.
7. The method of claim 1 wherein controlling operation of the DSL system based on the constructed HMM and analyzed update operational data comprises at least one of the following: determining the internal state of the DSL system; or controlling at least one of the following parameters of the operational line: data rate; target SNR margin (TSNRM); maximum SNR margin (MAXSNRM); minimum SNR margin (MINSNRM); FEC parameters; an FEC delay parameter; an FEC INP parameter; transmit power; a carrier mask parameter; a power spectral density parameter; a bit loading parameter; bit allocation; PSDMASK; CARMASK; or BCAP.