The specialist administers calling plans, direct routing, phone number inventory, and user voice policy assignment, and configures SBCs, dial plans, call routing, and emergency calling policies across sites and countries. The role deploys and maintains Teams Rooms devices, meeting room peripherals, and their firmware and update cycles, monitors call quality dashboards, and investigates poor-quality calls through to network or device root cause. Users are onboarded to voice services with adoption, training, and support after go-live, and the specialist coordinates with carriers and network teams on number porting, circuit changes, and service incidents. Teams call governance sits with this role as well, covering policies, apps, meeting settings, and the lifecycle of teams and channels, along with voice-related escalations and major incidents including bridge participation and post-incident actions. The specialist maintains voice documentation, dial plan records, and site-by-site configuration inventories, and reports on call quality, room device health, and license utilization to identify improvement opportunities.