Accenture (Ireland), Amdocs (Missouri, US), Cisco Systems, Inc. (US), Comarch S.A., (Poland), LM Ericsson Telephone Company (Sweden), Hewlett Packard Enterprise Company (U.S), Huawei Technologies. (China), International Business Machines Corporation (U.S), Mahindra Comviva (India), Mycom OSI (UK), Nokia Corporation (Finland), Oracle Corporation (U.S), Sigma Systems (Canada), Subex Limited (India), TEOCO Corporation (U.S)