Interact with US-based enterprises clients/customers to deliver high-quality support for Voice over Internet Protocol (VOIP) services. Configuration and Troubleshooting "SIP Trunking" Customer in SBC; DID and Pilot number configuration. Deploying, configuring, and troubleshooting VoIP infrastructure, such as IP-PBX systems, gateways, session border controllers (SBCs), and soft switches. Configure voicemail account, auto attendant, Voicemail, configuring call flow, call queue, add/modify/remove translation rule, Dial plan & Call routing.