(19)

(11)

EP 2 140 659 A2

(12)

(88) Date of publication A3: 12.03.2009 (43) Date of publication: 06.01.2010 Bulletin 2010/01 (21) Application number: 08747369.0 (22) Date of filing: 01.05.2008

(51) International Patent Classification (IPC):  H04L 29/06(2006.01) H04L 12/26(2006.01) H04L 12/18(2006.01) (86) International application number: PCT/US2008/062246 (87) International publication number: WO 2008/137563 (13.11.2008 Gazette 2008/46)

(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 MT NL NO PL PT RO SE SI SK TR (30) Priority: 03.05.2007 US 743966 03.05.2007 US 744034 (71) Applicant: Sonus Networks, Inc. Westford, MA 01886 (US)

(72) Inventors: SHEKAR, Nagesh, S. Bangalore 560082 (IN) SAKSENA, Vikram Acton, MA 01720 (US) FARAHMAND, Fardad Wellesley, MA 02481 (US) MENON, Sunil Bangalore 66 (IN) CHOLKAR, Arjun Vibhutipura 560037 (IN) NAGPAL, Ashish Kundalahalli 560037 (IN) VENKATA, Nagesh Kumar, Bollapalli Bangalore 560032 (IN) (74) Representative: Greene, Simon Kenneth  Elkington and Fife LLP Prospect House 8 Pembroke Road Sevenoaks, Kent TN13 1XR Sevenoaks, Kent TN13 1XR (GB)