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DSL Advances by Peter J. Silverman, John M. Cioffi, Massimo Sorbara, Thomas Starr

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5.10. Message Composition

In the list of octets (p. 143), only the group of parameters that are enabled or identified in SPar(1) field are sent, depending on the command or message type being sent. Table 5.4 below shows required fields for inclusion in each of the defined message types. Note the messages requiring transmission of the parameter octets are CL, CLR, MS, and MP. The remaining messages do not pass any information parameter octets.

5.11.1. Transaction Types

In the preceding discussion, we looked at the data structure of the transmitted message types. For proper use of the above message types and structures, G.994.1 defines permitted transaction types for use in the preactivation (handshake) session. In this section, we provide a general ...

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