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What is SIP Trunking? How to Choose the Right Provider

Selecting the Right SIP Trunking Provider

Choosing the right SIP trunking provider to align with your business goals can be a daunting task. With so many digital solutions promising similar outcomes on the surface, are you receiving the quality of service you’re paying for? 

To help you better understand what to look for when selecting the right provider for your business, we are going to cover the following: 

  • What is SIP Trunking? 
  • What to look for in a SIP trunking provider
  • How do you test a SIP trunk? 
  • Are there any free VOIP services? 
  • How can you get a free SIP account? 

When considering the right SIP trunking solution for your business, we believe you should have a comprehensive understanding of what you should look for. Not all providers offer the same features.

To best meet your needs, a full understanding of the SIP landscape is essential. Let’s break down some key features of what to pay attention to when considering a SIP trunking provider. 

First – What is SIP Trunking? 

At a glance, SIP trunking delivers unified communications services via the internet to customers with SIP-enabled private branch exchange solutions, otherwise known as IP-PBX. This allows users to communicate digitally at a quick pace across a variety of platforms. 

Because SIP utilizes both voice over internet protocol (VoIP) and session initiation protocol (SIP) to streamline your digital communications, the need for traditional telephone lines and PRIs disappears overnight. 

Rather than have a traditional business phone setup with countless analog lines running throughout your office, a SIP trunking solution translates your communications to the data network instead of traditional PRI and PTSN. 

What to Look for in a SIP Trunking Provider 

As we mentioned earlier, though there are many SIP trunking providers in the digital marketplace claiming to offer similar services, not all deliver equal quality. As you browse your options, you should select on that can offer these four key features: 

Low Cost 

Any SIP solution that makes a significant impact on your budget is not worth using. Rather, it should integrate at scale with your business. This allows you to maintain a low cost with high service quality. 

SIP.US trunking is optimized for low-cost, high-performance delivery. Just because you can easily afford a key tool for your business does not mean you should receive a subpar service in return. That is why our solution can grow within your operations as you do. 

Self-Service SIP Trunking 

If you are investing in SIP trunking, then you should have full control over the platform. This means control over your user interface, the ability to add or change service, and reviewing and exporting real-time call data records. 

When considering a SIP trunking provider, you should ask yourself the following questions about the solutions you are comparing: 

  • Can I easily navigate the user interface? 
  • Is it difficult to add or change my service? 
  • Is there an upcharge attached to adding or changing my service? 
  • What level of control do I have over my call data? 

SIP.US trunks put the user experience at the forefront. That is why we are constantly identifying areas to improve concerning user experience. Our solutions are designed to offer easy controls and access to your data without sacrificing premium performance. 

Legacy PBX Integration 

Few inconveniences are as bothersome as having to change over your personal cell phone number. Thankfully, that is no longer a common occurrence in the mobile industry. 

In a similar sense, you may not want to purge your legacy PBX solution from your business entirely. 

A SIP trunking provider that delivers quality service should also provide you the option to integrate your existing PBX with their network. This will allow you to improve your capabilities without having to subtract technology from your business that works best for your team. 

How do I Know if My PBX Can be Integrated? 

Most modern PBX products can integrate with a SIP solution. However, if you want to verify this, look for some key indicators: 

  • Does your PBX have a data jack or ethernet port? 
  • Check your user manual for instructions on configuring a SIP Trunk. 
  • Contact us to ask our team if your PBX will integrate 

Analog PBX Integration Capabilities 

If you are using a fully analog PBX solution that does not have a data jack or ethernet port, there is still a way to integrate it. 

Here, you will have to use what is called an analog telephone adapter. The ATA will connect to your legacy system and convert SIP, this will enable SIP.US trunks.


Many SIP providers require you to obtain bandwidth from them. This is simply not compatible with the way that businesses operate in a digital environment. 

Today’s digital environment requires businesses to have their systems work harmoniously for optimal performance. A SIP solution with the flexibility to choose the bandwidth supply that you prefer should be the standard, at minimum. 

Our SIP solution allows you to implement the bandwidth supply that matches your preferences. Choose from cable, DSL, T-1, or Metro Ethernet for seamless integration with how you run your business. 


Simply put: If your SIP solution proves unreliable, it is not even worth the free trial. As more companies are transitioning to full-digital and hybrid work environments where more meetings are happening in telecommuting settings than ever, uninterrupted service quality must remain a priority. 

Statistics show that 5 million employees work from home for at least half their workweek. Using a reliable network that will help keep everyone on the same page for your projects is critical. 

Look for a solution that leverages a reliable network that will not drop your call mid-meeting. For example, SIP.US utilizes only Tier-1 upstream providers to route our traffic. This results in peak experience across a redundant network that can be trusted to deliver your message. 

How Do You Test a SIP Trunk? 

Many business leaders that want to integrate a SIP trunking solution are motivated by a need to cut message latency. What is the greatest contributor to this common headache in the workplace? Lack of dedicated servers. 

We hate latency as much as you do. It can kill productivity and can cause miscommunication in your workplace. That is why SIP.US servers are solely dedicated to driving your communications without any filler getting in the way. 

Do you want to test our SIP trunk for latency? Though we believe it will not be necessary, you are more than welcome to do so. 

To test our servers, ping or If you prefer the SRV route, use 

Are There Any Free VoIP Services? 

Yes, there are a variety of free VoIP services that you can use for your business. However, free solutions often leverage large server networks not solely dedicated to VoIP. 

Selecting a provider that offers its services over a dedicated network is critical to reducing drop in messaging quality. However, with many free VoIP solutions that host countless users on their servers, this is easier said than done. 

The Biggest Problem with Free VoIP Services: The Servers 

Large companies that provide free VoIP services are often not delivering over dedicated servers. If your calls are battling for space against millions of users accessing these servers at the same time, the quality will suffer. 

Massive server networks that lack a dedicated SIP or VoIP focus are primarily concerned with offering the service at scale. Oftentimes, the tradeoff is a shortcoming in quality. 

If you are considering using a free VoIP service for your business, beyond quality, also consider the level of customer support you will receive for a non-premium product. Do you want to wait hours or days to have your issues resolved? Meetings will be missed and calls will be long over by then. 

Instead, look for a SIP solution that provides dedicated service delivery, offers concierge-level customer support, and has tight control over their servers. This will make sure call interruptions are a rare, if nonexistent occurrence and swift resolution to any problems you encounter during your workday. 

How Can You Get a Free SIP Account? 

You won’t believe that SIP trunking is the right unified communications solution for your business if you don’t try it firsthand. However, we believe that once you try it, you will not want to return to legacy technology. 

If you want to create a free SIP trunking account with SIP.US you can get started anytime. The no-obligation trial includes: 

  • 60 minutes of outbound calling to anywhere in the US48
  • Auto-generated SIP trunk for depositing and testing credit 
  • Agile configuration to integrate with your system for immediate use 

If you decide SIP trunking is not the right choice for your business, you can end the trial without any strings attached. 

Ready to Partner with a SIP Trunking Provider? Let’s Talk. 

Believing that you should never have to sacrifice performance for user experience, SIP.US has built the leading SIP trunking solution for businesses of all sizes looking to enhance their unified communications capabilities with seamless integration. No matter your company’s size, revenue, or industry, our scalable solution grows as you grow and can also maximize your messaging right where you are currently at. 
If you are interested in how we can serve your businesses as its trusted SIP trunking provider, get a free sip trunk for testing. We would love to speak with you more about how we can help you communicate better.

Free SIP Trunk in 60 Seconds

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