Hi, have installed Star2Star which has a network test to ensure the network has no issues prior to switching to VOIP.
Need a FREE or low-cost software to check to ensure that VOIP would work properly.
"Find Latency, Jitter & QoS Issues Across Internal & External Networks.
VoIP Monitoring · Path Visualization · BGP Routing · DNS Troubleshooting
Highlights: Get Complete Visibility, Captures Quality Metrics"