Latency is the time it takes a UDP packet to reach its destination. VoIP traffic is very sensitive to latency issues as VoIP latency leads to delays and echo in the conversation.

How Can I Resolve a VoIP Latency Issue?

The first step when trying to resolve a latency issue is to monitor the VoIP connection and overall bandwidth usage in the network.

PRTG Network Monitor offers two powerful methods for VoIP latency monitoring: the QoS sensor measures parameters such as UDP packet loss, jitter, Ethernet latency, etc. For IP-SLA enabled Cisco devices, PRTG includes an IP-SLA sensor, which reads similar metrics from those Cisco devices. Both methods show you the quality of your VoIP connection and enable you to define how much VoIP latency, jitter, etc. you are willing to accept. When this threshold is being crossed, you will instantly be notified and can take appropriate measures to reduce the latency issue.

PRTG is also an advanced bandwidth calculator. It lets you analyze which computer or application uses most bandwidth and shows you your organization's overall bandwidth usage. If this leaves little bandwidth for VoIP traffic, you can prioritize VoIP traffic or turn other applications off when you are using VoIP.

In addition to monitoring VoIP latency and bandwidth, the network monitoring utility also checks the availability and performance of servers and other network devices using more than 200 different sensor types (PING test, SNMP, WMI, NetFlow, etc.). It is the perfect tool for network troubleshooting, internet monitoring, for load and performance tests, and to monitor all kinds of servers, including virtual machines.

Apart from PRTG Network Monitor, Paessler also offers the web server load test tool WebServer Stress Tool.
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