(19)

(11)

EP 0 664 941 A1

(12)

(43) Date of publication: 02.08.1995 Bulletin 1995/31 (21) Application number: 93924940.0 (22) Date of filing: 13.10.1993

(51) International Patent Classification (IPC):  H04L 29/ 06( . ) H04L 12/ 413( . ) H04L 5/ 14( . ) (86) International application number: PCT/US1993/009864 (87) International publication number: WO 1994/009581 (28.04.1994 Gazette 1994/10)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 15.10.1992 US 19920961184 08.10.1993 US 19930131792 (71) Applicant: CABLETRON SYSTEMS, INC. Rochester, NH 03867 (US)	(72) Inventor: OLIVER, Christopher, J. Rochester, NH 03867 (US) (74) Representative: Morgan, James G., et al  Robert-Koch-Strasse 1 D-80538 München D-80538 München (DE)