Quick and easy VoIP troubleshooting
with PRTG


  • Measure latency, packet loss,
    and jitter

  • Check the quality of network device connections

  • Monitor Cisco routers and switches

  • Speed up VoIP troubleshooting


Free Download

Unlimited version of PRTG for 30 days. After 30 days, PRTG reverts to a free version.
Or, you can upgrade to a paid license anytime.






Digital telephone connections are becoming increasingly important, whether you’re dealing with your company’s own IP telephone system or the external voice-over IP (VoIP) services of an external provider. These systems are often plagued by errors, including poor to mediocre voice quality and sudden interruptions in calls.

PRTG Network Monitor identifies potential VoIP errors and weak spots so you can fix them at once. By monitoring your digital telephone connections, you’ll ensure your VoIP communications run smoothly. 


Free Download

Unlimited version of PRTG for 30 days. After 30 days, PRTG reverts to a free version.
Or, you can upgrade to a paid license anytime.



Monitor latency, packet loss, and
jitter with PRTG

VoIP errors can cause a variety of different problems, from annoying static and echoes to sudden dropped calls. These errors are mainly caused by packet loss and long latency times, both of which affect the quality of your connection. PRTG keeps a constant eye on these parameters, as well as jitter values. It also monitors your Mean Opinion Score (MOS), which allows you to evaluate the overall voice quality of your calls.

More on latency and jitter

Reasons for malfunctions

IP calls can bug for a variety of reasons. Your VoIP gateway may be improperly configured, your SIP provider may be skimping on the promised amount of bandwidth, or users may not be entirely familiar with how VoIP calls work. A monitoring tool like PRTG can help you keep track of all these issues. PRTG lets you spot and remove VoIP-related errors at once.






Check the quality of network device connections

PRTG comes with several preconfigured VoIP sensors so you can set up your VoIP monitoring with
just a few clicks.

These include the QoS (Quality of Service) Round Trip and QoS (Quality of Service) One Way sensors, 
the SIP Options Ping Sensor, and for Cisco devices, the Cisco IP SLA and SNMP Cisco CBQoS sensors.

Among other things, these sensors can be used to monitor SIP response codes and the quality
of your network connection.


Quick and easy VoIP troubleshooting with PRTG

PRTG immediately sounds the alarm if errors or malfunctions crop up in your VoIP. In the alarm function, you can choose to be alerted by SMS, push notification, or email. PRTG reveals the cause of the problem, allowing you to get down to troubleshooting at once. With PRTG, errors are eliminated immediately and costly VoIP downtime is kept to a minimum.

Monitor Cisco routers and switches

Cisco devices such as routers and switches collect jitter value themselves. PRTG comes with the preconfigured Cisco IP SLA Sensor which lets you monitor the preset threshold values of your Cisco IP Service Level Agreement (SLA). This sensor uses the Simple Network Management Protocol (SNMP) to read and display jitter and other VoIP values. PRTG also comes with the SNMP Cisco CBQoS Sensor, which uses Cisco Class Based Quality of Service (CBQoS) to monitor network parameters by way of SNMP. Among other things, this sensor helps you track and keep packet loss to a minimum.


German quality

Free Download
  • Unlimited version of PRTG for 30 days
  • After 30 days, PRTG reverts to a free version
  • Or, you can upgrade to a paid license anytime


Made in Germany: The PRTG Network Monitoring Tool is the fruit of an engaged team. The company was founded by Dirk Paessler. The Paessler AG headquarters are located in the city of Nuremberg, in the heart of Germany. We combine typical German virtues such as high quality standards, industriousness, and commitment with international, cosmopolitan flair. Read more about our firm here. By the way: We are regularly looking for new recruits.

Case Studies: Airports, utility companies, banks, colleges, hospitals: PRTG is present in every industry. For each of our customers, business and organizational processes depend on the proper functioning of the network infrastructure. The PRTG customer satisfaction is close to 100%. Read in our case studies how our customers use PRTG.

Product tests: It goes without saying that we are convinced by the quality of PRTG. But what about the others? PRTG has always performed extremely well in tests. PRTG user “LanLine” sums it up best: “PRTG was already good several years ago, and has gotten better from version to version ever since.” Such has been our steadfast and sincere goal. Read more about monitoring software product tests and comparisons here.

Support: Our support team works hard every day to help customers solve their monitoring problems. Our goal is to resolve all inquiries within 24 hours (on business days). We've drafted a comprehensive manual and built up an extensive knowledge base featuring videos, webinars, and FAQs. All support, of course, is also included!

Getting started is easy: The trial version is free, which means you can try our monitoring tool risk-free. To switch to another version of PRTG, simply search for an appropriate license. You can upgrade any time you like.




Network Monitoring Software - Version (January 26th, 2021)


Download for Windows and hosted version available


English, German, Spanish, French, Portuguese, Dutch, Russian, Japanese, and Simplified Chinese


Up to 100 sensors for free (Price List)

Unified Monitoring

Network devices, bandwidth, servers, applications, virtual environments, remote systems, IoT, and more

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