(19)
(11) EP 3 591 936 B8

(12) CORRECTED EUROPEAN PATENT SPECIFICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 B1)

(48) Corrigendum issued on:
29.09.2021 Bulletin 2021/39

(45) Mention of the grant of the patent:
18.08.2021 Bulletin 2021/33

(21) Application number: 19188070.7

(22) Date of filing: 30.08.2018
(51) International Patent Classification (IPC): 
H04L 29/06(2006.01)
H04L 29/08(2006.01)
 H04M 7/00(2006.01)
(52) Cooperative Patent Classification (CPC):
H04L 67/14; H04L 65/4023; H04L 65/1069; H04M 7/0057

(54)

ESTABLISHING A TELEPHONY SESSION

HERSTELLUNG EINER TELEFONIESITZUNG

ÉTABLISSEMENT D'UNE SESSION DE TÉLÉPHONIE

(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30) Priority: 30.08.2017 GB 201713859

(43) Date of publication of application:
08.01.2020 Bulletin 2020/02

(62) Application number of the earlier application in accordance with Art. 76 EPC:
18191724.6 / 3451618

(73) Proprietor: Metaswitch Networks Ltd
Enfield, Middlesex EN2 6BQ (GB)

(72) Inventors:
  • HOTHAM, David
    Enfield, Middlesex EN2 6BQ (GB)
  • UNDERWOOD, Richard
    Enfield, Middlesex EN2 6BQ (GB)
  • ROBINSON HODGES, Andrew
    Enfield, Middlesex EN2 6BQ (GB)

(74) Representative: CMS Cameron McKenna Nabarro Olswang LLP 
Cannon Place 78 Cannon Street
London EC4N 6AF
London EC4N 6AF (GB)


(56) References cited: : 
US-A1- 2012 033 610
 US-A1- 2014 106 720
   
       
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).