Patent ID: 8121131

Claim:
A method for transmitting at least one tributary in synchronous mode at the level of a link of a data network, said tributary comprising at least one frame in the SDH or SONET format, said frame comprising at least one payload envelope area and one transport overhead area, said payload envelope area comprising at least one payload and load supervision data related to the payload, said transport overhead area comprising at least transport supervision data related to transport and an area of fixed pattern comprising fixed patterns, said method comprising: modifying said frame so as to generate a modified frame; transmitting said modified frame, the modification comprising: storing the transport supervision data of said frame of said tributary; introducing a delay to said frame; deleting part of said fixed patterns from said fixed pattern area; recording the positions of said part of the fixed patterns deleted; and inserting the stored transport supervision data at the level of said positions in said area of fixed patterns.