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Kharmela Mindanao

By: Kharmela Mindanao on July 12th, 2023

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6 Common VoIP Problems (& How to Fix Them)


Voice over Internet Protocol (VoIP) services promise a lot: cost-effective and flexible calling capabilities, all while eliminating the need for traditional phone lines. However, like any tech, VoIP has its issues.  

From call quality instability to network complications, you may encounter various problems that can disrupt your communication experience. 

Here at Intelligent Technical Solutions (ITS), we know how important it is to stop these VoIP problems from ever materializing. Managing hundreds of business communication systems requires attention to detail and in-depth knowledge, which we believe all VoIP users should have. 

So in this blog, we will explore the following six common VoIP problems that users often face (according to our experience) and provide practical solutions to overcome them.  

1. Internet reliance 

2. Bandwidth limitations 

3. Power outage vulnerability 

4. Emergency call incompatibility 

5. Security vulnerabilities 

6. Equipment and compatibility issues 

Whether you’re a business owner looking into VoIP or someone already experiencing these challenges, understanding them and their remedies will help you optimize your VoIP experience and maintain uninterrupted, crystal-clear calls. 

1. Internet Reliance 

VoIP relies heavily on a stable and reliable internet connection. No internet = no working VoIP system. So, if the internet connection is weak or experiences frequent outages, it can lead to poor call quality, dropped calls, or intermittent service. 


Because VoIP inherently depends on an available internet connection, the best solution is to have a backup internet service. You can also install a landline connection as an emergency backup plan.  

person on a phone call

2. Bandwidth Limitations 

VoIP requires a certain amount of bandwidth to ensure smooth voice transmission and is sensitive to network congestion and delays. 

Suppose the network is heavily loaded or prioritizes other types of traffic, such as video streaming or large file downloads. In that case, it can affect call quality and introduce delays or packet loss. 


Implement bandwidth monitoring. Once you have your company’s bandwidth allocation, you can set bandwidth allocation rules and ensure your VoIP system is always prioritized.  

If you have the funds, you can also shift to an internet plan with higher bandwidth.  

3. Power Outage Vulnerability 

Unlike traditional landline phones that can operate during power outages, VoIP services usually rely on electrical power. If there is a power outage and you don’t have a backup power source, such as a battery backup or generator, your VoIP service may become unavailable. 


As a business owner, the best steps would be to install a backup power source or get a landline for emergencies.  

Why Switch to VoIP? A Complete Guide

4. Emergency Call Incompatibility 

VoIP services are not always fully compatible with emergency services. Unlike traditional landline phones, VoIP relies on an IP address, which brings a whole host of problems: 

  • Not directly connecting to the 911 call center serving your current location  
  • Inaccurate location information  
  • Not transmitting phone numbers and/or location information 


Because of these issues, the Federal Communications Commission (FCC) requires VoIP users to:  

  • Provide the accurate and updated address to your VoIP service provider  
  • Have a clear understanding of any limitations of your 911 service 
  • Inform relevant personnel about your VoIP service and its possible 911 limitations 
  • Consider installing a backup power supply, maintaining a traditional phone line, or having a wireless phone as a backup 
  • Clarify if their local 911 can receive text messages and refrain from video calls 

person dialing a phone

5. Security Vulnerabilities 

VoIP calls transmitted over the internet are susceptible to security risks such as Denial of Service (DoS) attacks, vendor data breaches, and call spoofing. Without appropriate security measures, there is a potential for privacy breaches or unauthorized use of VoIP services. 

Related: 5 Most Common Types of Cyberattacks to Look Out For 


The best solution is implementing a long-term cybersecurity plan that follows industry best practices and a cybersecurity framework. 

6. Equipment and Compatibility Issues 

VoIP often requires specific hardware or software for optimal performance. Compatibility issues may arise if the VoIP service provider’s equipment or protocols are incompatible with your devices or systems.  


To stop potential equipment and compatibility issues, you’ll need to do in-depth research into your VoIP service by asking the right questions. 

person making a call

Want to See if VoIP is for You? 

From security issues and addressing bandwidth constraints to dealing with emergency call incapability, these issues can quickly put companies off getting a VoIP system.  

And yet, over 67 million subscribers use - and will continue to use - VoIP. As a managed IT service provider, ITS still sees the value VoIP brings our customers daily.  

To make the best decision about using VoIP for your business, you need more than just the downsides of the service. Here are resources that can help expand your understanding of VoIP:  

But if you want a deeper look at VoIP, check out our Why Switch to VoIP? A Complete Guide. It answers the most common questions and provides insider information to understand the service better. 

Why Switch to VoIP? A Complete Guide