# VoIP monitor software| IP SLA monitor| VoIP traffic: NetFlow Analyzer ## Cisco IP SLA monitoring Monitor VoIP using Cisco IP SLA and NetFlow VoIP (Voice over Internet Protocol) is a general term for a family of transmission technologies for delivery of voice communications over IP networks such as the Internet or other packet-switched networks. Most businesses are gradually migrating to VoIP technology because of its bandwidth efficiency and low cost. All communications (phone calls, faxes, voice mail, e-mail, Web conferences and more) can be treated as discrete units. VoIP runs both voice and data communications over a single network, which can significantly reduce infrastructure costs. ![How VoIP monitor works](https://www.manageengine.com/products/netflow/images/how-voip-monitor-works.png) In VoIP-based voice communication, the analog voice signal is converted to digital format, which in turn is converted into Internet Protocol (IP) packets. These IP packets are transmitted over the internet. The above process is exactly reversed at the receiving end. The greatest concern for any business using VoIP for voice communications is quality. Jitter, latency, and packet loss cause a drop in the quality of the voice communication being transmitted. Hence, VoIP must be monitored to maintain the quality of voice communications by ensuring that jitter, latency, and packet loss values do not exceed the threshold. ## VoIP Monitoring Dashboards and Reports ### Top Call Path Dashboard [![Top call path dashboard](https://www.manageengine.com/products/netflow/images/top-10-voip-reports.png)](https://www.manageengine.com/products/netflow/images/top-10-voip-reports.png) **Top Call Path Dashboard:** The top call path widgets show the locations and their destinations along with the jitter, latency, and packet loss details. It lists bad call path details on your VoIP network and categorizes top call paths by jitter, latency, MOS, and packet loss. ### VoIP Monitor Overview [![VoIP Monitor Overview](https://www.manageengine.com/products/netflow/images/voip-monitor-reports.png)](https://www.manageengine.com/products/netflow/images/voip-monitor-reports.png) **VoIP Monitor Overview** This list shows the path, MOS, RTT, latency, jitter, and packet loss details for each of the different paths present in the VoIP network. These values are updated at each poll. The availability and next poll time are also shown. ### Min/Max MOS History Graph [![Min/Max MOS History Graph](https://www.manageengine.com/products/netflow/images/min-max-history-graph.png)](https://www.manageengine.com/products/netflow/images/min-max-history-graph.png) **Min/Max MOS History Graph** The MOS (Mean Opinion Score) history graph gives Min/Max jitter values over time to measure the quality of calls expressed on a scale from 1 to 5. This graph helps identify call quality statistics for the selected path. ### VoIP Availability Graph [![VoIP Availability Graph](https://www.manageengine.com/products/netflow/images/voip-availability-graph.png)](https://www.manageengine.com/products/netflow/images/voip-availability-graph.png) **VoIP Availability Graph** The availability graph displays the availability status as a percentage over a period of time and highlights unreachability of the polled data. ### VoIP Positive and Negative Jitter Graph [![VoIP Positive and Negative Jitter Graph](https://www.manageengine.com/products/netflow/images/voip-positive-negative-jitter.png)](https://www.manageengine.com/products/netflow/images/voip-positive-negative-jitter.png) **VoIP Positive and Negative Jitter Graph** Monitor jitter in real time for each path from source to destination and drill down for any sudden spike in the jitter graph. ### VoIP Round Trip Time History Graph [![VoIP Round Trip Time History Graph](https://www.manageengine.com/products/netflow/images/vop-round-trip-graph.png)](https://www.manageengine.com/products/netflow/images/vop-round-trip-graph.png) **VoIP Round Trip Time History Graph** Monitor minimum, maximum, and average RTT to check for time delay in communication and troubleshoot voice quality degradation. ### VoIP Packet Loss Graph [![VoIP Packet Loss Graph](https://www.manageengine.com/products/netflow/images/voip-packet-loss-graph.png)](https://www.manageengine.com/products/netflow/images/voip-packet-loss-graph.png) **VoIP Packet Loss Graph** Monitor packet loss to determine how many packets are being dropped and how this affects the quality of the established call connection. ### VoIP Error Statistics Graph [![VoIP Error Statistics Graph](https://www.manageengine.com/products/netflow/images/voip-packet-error-statistics-graph.png)](https://www.manageengine.com/products/netflow/images/voip-packet-error-statistics-graph.png) **VoIP Error Statistics Graph** Monitor errors such as late packet arrival, MIA, and out-of-sequence packets for the selected time period to detect poor communication connections. ## Scenario A company based in the United States recently moved from PSTN to VoIP-based technology. The network manager began receiving numerous complaints regarding voice communication. Staff reported a drop in voice quality, reflected as broken communication and talk-over effects. The network manager was unable to identify the source of the problem. He was advised to try ManageEngine NetFlow Analyzer, which includes a VoIP monitoring feature. The network manager installed ManageEngine NetFlow Analyzer to monitor bandwidth and identify the reasons for the drop in voice communication quality. The monitoring tool uses **Cisco's IP SLA to monitor VoIP**. VoIP monitoring displays data on jitter, latency, packet loss, and MOS. The network manager used the VoIP monitor to view top call performances by location. He clicked on a top call path to view call path details and threshold information. He also reviewed graphical representations of MOS, jitter, latency, packet loss, and round trip time for that particular call path. The network was monitored at different time intervals, and the collected data was used to assess network performance and assist in troubleshooting. **Note:** Reporting on VoIP is available as an add-on. It is available during the 30-day trial period, after which a separate license must be applied for the VoIP add-on. **Download:** [Download](https://www.manageengine.com/products/netflow/download.html?mb) **Online Demo:** [Online Demo](http://demo.netflowanalyzer.com?mb) **Product overview:** [Product overview](https://show.zohopublic.com/publish/h8zn33d986963282848aaa0448b412bbfa157) NetFlow Analyzer is a NetFlow, sFlow, JFlow ([and more](https://www.manageengine.com/products/netflow/supported-devices.html)) collector and analysis engine integrated together. NetFlow Analyzer is software (for [Windows and Linux](https://www.manageengine.com/products/netflow/netflow-analyzer-linux-windows.html)) and does not require any hardware probes. It can be downloaded, used in your network environment, and evaluated for 30 days. For more information on how NetFlow Analyzer can help you understand your [network traffic](https://www.manageengine.com/products/netflow/network-traffic-monitor.html) and [bandwidth utilization](https://www.manageengine.com/products/netflow/bandwidth-utilization-and-network-traffic-monitoring.html), refer to the relevant resources.