X.25, the international CCITT standard of 1976, is a notable use of packet switching in that it provides to users a service of flow-controlled virtual circuits. These virtual circuits reliably carry variable-length packets with data order preservation. DATAPAC in Canada was the first public network to support X.25, followed by TRANSPAC in France.
x25 the international ccitt standard of 1976 is a notable use of packet switching in that it provides to users a service of flow-controlled virtual circuits these virtual circuits reliably carry variable-length packets with data order preservation datapac in canada was the first public network to support x25 followed by transpac in france