Method of transferring data via bypass line in connection-type network

A terminal used in a connection-type network in which nodes are connected via communication lines and terminals are connected to the nodes, said terminal comprising:

• a CPU;
• a memory storing a program therein for controlling said CPU;
• and
• an input/output unit, wherein said program comprises:
• means for receiving a request from another terminal via an existing connection on a first communication line, the request requesting transfer of data to said another terminal via a second communication line;
• means for deciding whether to use the second communication line for transfer of the data with respect to each element of the data by referring to a table that shows whether to use the second communication line with respect to each element of the data;
• means for sending a message to a node connected to said input/output unit in response to the request, the message requesting for establishment of a connection on the second communication line between the node and one of the nodes connected to said another terminal, wherein the second communication line is established on a route separate from a route of the first communication line;
• and
• means for transferring all or part of the data via the connection on the second communication line.

A node used in a connection-type network in which nodes are connected via communication lines and terminals are connected to the nodes, said node comprising:

• a CPU;
• a memory storing a program therein for controlling said CPU;
• and
• a plurality of ports for providing connections, wherein said program comprises:
• means for receiving an establishment message requesting establishment of a connection on second communication line in addition to a connection on a first communication line already in existence between said node and another one of the nodes, wherein the second communication line is established on a route separate from a route of the first communication line;
• and
• means for establishing the connection on the second communication line between said node and said another one of the nodes by using the second communication line;
• wherein said memory further includes a table stored therein that shows whether to use the second communication line with respect to each element of data to be transferred, and said program further comprises means for deciding whether to use the second communication line for transfer of the data with respect to each element of the data by referring to said table.