DSL Advances

5.4. Information Field Structure

The next step is to define the data structure of the message field. The message field, shown in Figure 5.4, consists of three components in the following sequence:

• The identification (I) field

• The standard information (S) field

• The nonstandard information (NS) field

Figure 5.4. Message field structure.

The identification field identifies the message type, the revision number of the G.994.1 Recommendation that the equipment is following, identification of the equipment vendor or manufacturer, and identification of parameters independent of the mode of operation. The standard information field contains parameters that ...