It offered the X.25 interface to its users, the CCITT standard of 1976 for which computer scientists of the Centre national d'études des télécommunications (CNET) had played a major role.
[1] Initially created for professional customers, it was later used by millions of French terminals Minitels to access consumer applications, forerunners of those of the Internet.
[1] In 1987, Transpac was the world's largest public packet-switched network with revenues of nearly $400m.
[2] Minitel videotex services accounted for 45% of its data and 20% of its $678m revenue in 1990.
[4] France Télécom closed the Minitel service, and the Transpac network via which it was available, in June 2012.