Data transmission apparatus efficiently using network resources

A non-transitory computer readable storage medium storing a program, which a computer executes to realize a data transmission process in a network composed of a plurality of data transmission apparatuses, said computer, when executing the program, operative for performing the steps of:

• (a) disconnecting a number being at least one but not all of a plurality of sequence connections established between transmission plugs of a transmitting node and reception plugs of a receiving node, both nodes being connected to the network wherein the transmission plugs and reception plugs are operative for transmission and reception of a plurality of sequences in one isochronous stream;
• (b) requesting optimization of transmitting sequences to the transmitting node for transmission to the receiving node via the plurality of sequence connections reduced by the number of disconnected sequence connections;
• (c) receiving information about at least one of the transmission plugs newly assigned to a transmitting sequence used by the transmitting node of which the at least one of the plurality of sequence connections has been disconnected by the disconnecting step (a), the information being received as an answer for the optimization request from the transmitting node;
• and
• (d) establishing at least one new sequence connection between the at least one newly assigned transmission plug and at least one of the reception plugs of the receiving node of which the at least one of the sequence connections has been disconnected by the disconnecting step (a).