The MIB module defining objects for the management of a pair of VDSL modems at each end of the VDSL line. Each VDSL line has an entry in an ifTable. An agent may reside at either end of the VDSL line however the MIB is designed to require no management communication between them beyond that inherent in the low-level VDSL line protocol. The agent may monitor and control this protocol for its needs. VDSL lines may support optional Fast or Interleaved channels. If these are supported, additional entries corresponding to the supported channels must be created in the ifTable. Thus a VDSL line that supports both channels will have three entries in the ifTable, one for each physical, fast, and interleaved, whose ifType values are equal to vdsl(97), fast(125), and interleaved(124), respectively. The ifStackTable is used to represent the relationship between the entries. Naming Conventions: Vtuc Vtur Vtu Curr Prev Atn ES LCS Lof Lol Los Lpr xyzs (e.g., xyz=Lof, Los, Lpr) Max Mgn Min Psd Snr Tx Blks