3. Services to be identified by the end of 1990 : - teleservices using packet transmission : teletex, viodeotex, teleshopping, telesur- veillance, telealarm, - audiography, powerful videophones.
- 4 - 3. services a indentifier pour fin 1990 : - teleservices par transmissions en paquets : teletex, viodeotex, teleachat, telesurveillance, telealarme; - audiographie, visiophonie performante.