| 摘要 |
<p>The frame carries useful data which are preceded by a synchronisation pattern (F). The frame has a sequence of data imitating the synchronisation pattern as well as 'forbidden' sequences (X1,X2). The forbidden sequences are replaced by substitution data (S0,S1,S2) which allow on reception reinsertion of the 'forbidden' sequences among the useful received data. The substitution data contain operation and addressing information (A1,A2) which indicate precisely the presence and position where the 'forbidden' data need to be reinserted on reception.</p> |
