(19)

(11)

EP 2 253 129 A2

(12)

(88) Date of publication A3: 08.10.2009 (43) Date of publication: 24.11.2010 Bulletin 2010/47 (21) Application number: 09709920.4 (22) Date of filing: 13.02.2009

(51) International Patent Classification (IPC):  H04M 7/00(2006.01) H04L 29/06(2006.01) (86) International application number: PCT/EP2009/051736 (87) International publication number: WO 2009/101191 (20.08.2009 Gazette 2009/34)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 13.02.2008 GB 0802645 (71) Applicant: FRANCE TELECOM 75505 Paris Cedex 15 (FR)	(72) Inventor: PEARSON, Paul Bradley Stoke Bristol BS32 4QJ (GB) (74) Representative: Spaargaren, Jerome et al EIP Fairfax House 15 Fulwood Place London, Greater London WC1V 6HU London, Greater London WC1V 6HU (GB)