VoIP or Voice Over Internet Protocol is a modern substitute for traditional phone lines that make communication efficient using the Internet. The main motive behind the invention of VoIP technology is to lower domestic and international telephone charges. 

There are two types of VoIP systems: fixed and non-fixed VoIP. One of the common traits of both technologies is that they allow users to make calls from any part of the globe at a cheaper rate.

In this article, I’ll dig deep into fixed and non-fixed VoIP systems. So, without any further ado, let’s get started.

What is a Fixed VoIP Phone Number?

What is a Fixed VoIP Phone Number

A fixed VoIP phone number is linked or attached to a physical address. In other words, it is an internet-based phone line connected to an actual address and an account owner

The phone number will be linked to that specific address even if you switch to another VoIP provider. Since fixed VoIP numbers are tied to a specific location, businesses carry a professional aura among the clients.

Most importantly, due to their physical presence, they aren’t seen as spammy compared to the non-fixed VoIP numbers.

What is a Non-Fixed VoIP Phone Number?

What is a Non-Fixed VoIP Phone Number

A non-fixed VoIP phone number, also referred to as a virtual phone number, is not linked to a specific address, just like a fixed VoIP phone number. It is dedicated to a person or a device. 

It lets you make calls anytime, in any part of the world, via the Internet. The primary benefit of the non-fixed VoIP phone number is that such phone numbers can be handy for making and receiving calls from anywhere. 

Businesses that don’t have physical locations love this flexibility and consider this a better option than having a fixed VoIP phone number.

Fixed and Non-Fixed VoIP: Differences

Shaping up your business starts with the right phone system. Voice over Internet Protocol (VoIP) provides exactly that. The only question that arises is which one to go for, either fixed or non-fixed VoIP. 

Here, we’ll understand the critical difference between these two so you know precisely which suits your business.

But before diving into the differences, let’s get to what they have in common:

  1. Both of these systems need an internet connection to operate and function properly.
  2. Both of them use the same kind of VoIP phones and equipment.
  3. Has the same benefits like affordable, advanced call features, scalability, ease of use, etc.
  4. Both are cheaper options than traditional phone lines.
  5. Both eliminate the need for having a physical infrastructure.
FeatureFixed VoIPNon-fixed VoIP
Dedicated Physical AddressYesNo
Emergency Services A more precise and accurate location is providedHas less chance of being accurate
Trust and CredibilityMore because of the physical locationOften seen as less trustworthy
CostHigher configuration chargesLower charges
EquipmentMight need specific hardwareNo need for dedicated equipment or device
FlexibilityOnly limited to the linked addressIt can be used from anywhere with an Internet connection
Calling OptionsDomestic and International plansDepends on the service provider

Fixed VoIP Pros and Cons

Fixed VoIP Pros

  • More Credibility: When a business uses a fixed VoIP number, customers and the general audience automatically view it as trustworthy and reliable.
  • Makes Customer Aware: Fixed VoIP numbers are tied to a physical location, so the company calls always come up with the same caller ID. This way, customers can recognize who is calling before picking up the call.
  • Accurate Emergency Services: Fixed VoIP numbers are assigned to an actual address so your location can be precisely tracked. Hence, emergency services can be fast and accurate.
  • Several Calling Options: Most fixed VoIP service providers offer various calling plans, like local, domestic, and international options. So, businesses can make calls in any part of the world with minimal budget. 
  • Supports Advanced Features: Fixed VoIP systems include advanced functionalities like call forwarding, voicemail, call transfer, call analytics, etc. Hence, businesses can handle high call volumes and eventually enhance customer service.

Fixed VoIP Cons

  • Heavy Reliability on Stable Internet Connection: Fixed VoIP calls can only be made with the help of an Internet connection. Hence, low internet quality impacts the entire call flow and frustrates the customers.
  • High Device Costs: Implementing a fixed VoIP system may include buying specific VoIP phones or adapters. This way, you’ve to spend more money from your pocket.
  • Limited Location Flexibility: A fixed VoIP phone number is assigned to a specific physical address. It will not be an ideal option if your business operates remotely.

Non-Fixed VoIP Pros and Cons

Non-fixed VoIP Pros

  • Lower Costs: Landlines or a cellular network are costly, especially for long-distance calls. A non-fixed VoIP phone number saves money on national and international telephone charges.
  • Strong Security Measures: Non-fixed VoIP systems develop encryption and security protocols to safeguard customers’ sensitive data from attacks.
  • Promotes Remote Work Collaboration: Like fixed VoIP systems, non-fixed VoIP doesn’t need a proper office building to run its operations. Hence, employees can work from home or their desired location using a virtual business phone number.
  • Scalability: Businesses can add more or remove existing virtual numbers as they grow bigger. 
  • Freedom: Businesses can use virtual numbers on their preferred device, whether a desktop, laptop, or mobile phone.

Non-fixed VoIP Cons

  • Porting Struggles: Porting a traditional telephone number is an easy job, but not in the case of a fixed VoIP number. Porting to another service provider is a struggling and overwhelming task.
  • Higher Risk of Spam: Non-fixed VoIP numbers tend to be attacked by scammers and spammers. Hence, businesses can get fake calls and unwanted activities. 
  • Emergency Services Difficulties: Tracking the caller’s address is hard because non-fixed VoIP numbers aren’t assigned a location. So, emergency services like 911 are a bit challenging for non-fixed VoIP numbers.                                                       

How to Get a Non-Fixed VoIP Number?

How to Get a Non-Fixed VoIP Number

Getting a non-fixed VoIP number or a virtual phone number is a quick and easy job. All you have to do is follow some steps, so let’s get onto it.

Step 1: Select a VoIP Service Provider

Many VoIP service providers are in the market; you should select one that will suit your business. While choosing, look for factors like pricing, features, customer support, customer reviews, etc.

Please choose the ideal one from all the aspects I’ve mentioned here.

Step 2: Sign Up and Pick a Plan

Next up, you need to complete the signup process by visiting the official website of the selected VoIP service provider. 

You need to create an account by providing an email address, personal info, and business details. You must also pick a subscription plan that is under your budget and provides all the required features.

Step 3: Choose a Non-fixed Phone Number

Once you complete the sign-up process, select the virtual phone numbers that you want for your account. Some of the service providers offer a variety of virtual numbers based on area codes or country locations. 

You can browse their virtual phone numbers and pick a number that goes well with your location. 

Based on the chosen service provider, some allow you to port your current phone number to the VoIP service.

Step 4: Connect to the Internet

Since VoIP services need the Internet to run, a reliable Internet connection is a must to make and receive phone calls. 

Hence, choosing a reputed Internet service provider is critical. Not only that, but you must ensure your Internet has enough bandwidth to run voice calls uninterruptedly.

Step 5: Configure Equipment

To get your fixed VoIP phone system up and running, hardware like IP phones, adapters, and softphones may be needed. However, it mainly depends on your chosen VoIP service provider. 

Step 6: Perform Test Calls

Now, the time has come to test the fixed VoIP connection. Test all your devices and equipment so that every system is configured correctly before going live. 

Then, afterward, you need to conduct test calls to ensure the audio quality is good.

Best Practices for Non-Fixed VoIP Numbers

Best Practices for Non-Fixed VoIP Numbers

Non-fixed VoIP number is ideal for call centers, remote teams, and businesses of all sizes. It allows you to run your business more efficiently and improve customer satisfaction. Here are some of its best practices:

Technical Adjustments

Since you know non-fixed VoIP depends on the internet, you need to have a stable and high-speed connection so that call quality remains smooth.

Ensure you have a backup power source to tackle problems like power outages.

Brand Your Business

First, you must pick a virtual number that aligns with your brand image. You need to mention your name and the company’s name at the beginning to sound professional during calls.

Lastly, you must record a crisp and clear voicemail greeting with your name, company, and call to action.

Data Security

Before deciding to choose a VoIP service provider, ensure you look into the security portion as well. 

Go with a service provider that includes strong security measures so that customer’s sensitive data remains protected by all means.

Put your Number Online

Include the virtual number on your website to generate more leads or make your business appear trustworthy. Make the number easily accessible to the target audience by placing it on the website, business cards, and social media profiles.

Monitor Performance

Analyze call reports and data to figure out the areas that need improvement. Based on that, you can take specific actions or optimize your communication strategies to streamline the business operations.

Proper Training and Support

Invest in staff training so your team understands the VoIP system and its features effectively. It affects the performance of the organization positively and minimizes disruptions.

What To Choose: Fixed or Non-Fixed VoIP?

Whether to go for fixed or non-fixed VoIP depends on various factors and needs. To help you decide better, let’s break down the points to consider:

Choose Fixed VoIP if:

  • You need a fixed VoIP number if you run a local business.
  • A Fixed VoIP number is ideal for large businesses with high call volumes due to specific SIP trunks.
  • Businesses that seek cheaper rates for making domestic calls require a fixed VoIP number.

Choose Non-Fixed VoIP if:

  • If you have clients from every corner of the world, a non-fixed VoIP number is a better option.
  • Businesses that operate with remote teams should look for non-fixed VoIP numbers due to no restrictions on calls from any location.
  • Non-fixed VoIP numbers are comparatively cheaper than fixed VoIP for making international calls.
  • If you don’t want any complexities in technical setup, installation, and management, then non-fixed VoIP is viable.


And that’s a wrap! So, in this article, I’ve covered fixed and non-fixed VoIP profoundly and in greater depth. I hope you like it.

Today, all businesses, from minor to big, have switched to VoIP systems. VoIP allows the exchange of audio, video, or texts all-in-one in one system. So businesses no longer have to rely on multiple different applications to communicate with teams. And that is cost-efficient. 

Fixed and non-fixed VoIP are great alternatives for landlines or cellular networks, saving costs and providing many calling features. Depending on your needs, preferences, and budget, you can choose the right type of VoIP for your business.


What is the difference between fixed VoIP and non-fixed VoIP?

Fixed VoIP is associated with a physical address and has a local presence, while non-fixed VoIP doesn’t. This is the significant difference between these two VoIP systems.

Why would someone use a non-fixed VoIP?

Non-fixed VoIP isn’t linked to a specific location, so adding multiple numbers is easy. It is best suited for remote teams and global businesses. Apart from that, non-fixed VoIP is cheap.

Can a non-fixed VoIP number be traced?

Tracing non-fixed numbers is possible but is too hard. It isn’t tied to an actual address and can be used from anywhere with an internet connection, so tracing is difficult.

What are the two major protocols for VoIP signaling?

The two major protocols for VoIP signaling are SIP (Session Initiation Protocol) and H.323. SIP is a modern protocol for VoIP systems, whereas H.323 is an older protocol established by the International Telecommunication Union (ITU).

Sandipan Khadka is an Associate Content Writer at Dialaxy with the knack of writing content that is appealing for the readers. He has written broadly in the area of VoIP and call center solutions.