multi link procedure (X.25) (MLP)

Multi Link Procedure (MLP) is a multiple transmission procedure for handling logical multi link operation, as specified for example in ITU- TX.25.

The MLP procedure represents a control procedure superordinate to the link layer; it is located between the protocol control of layer 2 and the link layer. With the MLP procedure, it is possible to split the data stream at the transfer point between the physical layer and the data link layer into several, possibly also different, physical transmission sections at the sender end. In the target system, the individual message sections are reassembled in the correct sequence.

The MLP process coordinates the transmission, ensures synchronization and the correct sequentiality, it ensures that the data blocks transported via different transmission paths are handed over to the data user in the target system in the correct number and the correct sequence.