CHANNEL REVISION CONTROL SYSTEM

摘要

PURPOSE:To quickly revise channel structure by a line terminator by defining a field designating optional one among plural kinds of channel structures and writing it therein to a layer 1 information section of a layer 1 frame. CONSTITUTION:A field designating one optional structure among plural kinds of structures and writing it therein is defined to the layer 1 information section of layer 1 frame and the value to be written in the field is revised depending which structure is adopted among plural kinds of channel structures in the case of revising a channel through the adoption of one desired channel structure among plural kinds for the channel structure adopted by the channel part of the layer 1 frame according to the request of a line terminator at the layer 1 frame transmission side. Then a line terminator of the layer 1 frame reception side observes the value written in the field of the received layer 1 frame to recognize to which among the plural kinds the channel structure is revised. Thus, the line terminator of the side requesting the change of the line channel structure revises the channel structure automonously and immediately.