[1] BELLCORE, AIN REQUIREMENTS IMPLEMENTAT SUPPORT GRP, BELLCORE, NJ 07701 USA
[2] NIPPON TELEGRAPH & TEL PUBL CORP, PLANNING GRP, RES & DEV HEADQUARTERS, TOKYO, JAPAN
[3] CNET, DEPT NETWORK ARCHITECTURE & SERV, PARIS LAB A, ISSY LES MOULINEAX, FRANCE