(19)

(11)

EP 1 105 987 A1

(12)

(43) Date of publication: 13.06.2001 Bulletin 2001/24 (21) Application number: 99928604.0 (22) Date of filing: 11.06.1999

(51) International Patent Classification (IPC)7: H04J 3/06, H04J 3/04 (86) International application number: PCT/US9913/282 (87) International publication number: WO 9965/170 (16.12.1999 Gazette 1999/50)

(84) Designated Contracting States: BE CH DE ES FR GB IT LI NL PT SE (30) Priority: 12.06.1998 US 89172 P 18.08.1998 US 96971 P 09.06.1999 US  (71) Applicant: Videoserver, inc. Burlington, MA 01803 (US)	(72) Inventor: OLIVEIRA, David, P. Somerset, MA 02726 (US) (74) Representative: Greenwood, John David et al Graham Watt & Co.Riverhead SevenoaksKent TN13 2BN SevenoaksKent TN13 2BN (GB)