(19)

(11)

EP 0 750 816 A1

(12)

(43) Date of publication: 02.01.1997 Bulletin 1997/01 (21) Application number: 96900226.0 (22) Date of filing: 17.01.1996

(51) International Patent Classification (IPC):  H04L 12/ 66( . ) H04L 12/ 28( . ) H04L 29/ 06( . ) (86) International application number: PCT/CA1996/000025 (87) International publication number: WO 1996/022645 (25.07.1996 Gazette 1996/34)

(84) Designated Contracting States: BE CH DE FR GB IT LI SE (30) Priority: 17.01.1995 GB 19950000837 (71) Applicant: NEWBRIDGE NETWORKS CORPORATION Kanata, Ontario K2K 2E6 (CA)	(72) Inventors: HURD, Jim Ottawa, Ontario K1S 0T2 (CA) BENNING, Rex Kanata, Ontario K2K 2P4 (CA) (74) Representative: Harding, Richard Patrick, et al  A. R. Davies & Co. 27 Imperial Square Cheltenham GL50 1RQ Cheltenham GL50 1RQ (GB)