knowledge on: Yeastar, Mitel & 3CX Certification and ECN Certification. Must have VOIP Knowledge, VBX and the customers on new PBX systems, VOIP systems and ECN products and MAN3000 systems. Experience on IP based Ref:PBXEng/PaarlP Yeastar, Mitel & 3CX Certification and ECN Certification. Must have VOIP Knowledge, VBX and