SIP Trunks for
Nonprofit Organizations

Nonprofit financial leaders have a lot of responsibilities to juggle. From shifting tax codes and changing regulations to the increased competition for donors and volunteers, leading a nonprofit is a tough challenge. But the obstacles makes success that much more rewarding.

The cost of telecommunications can take up a significant portion of the budget that could be reinvested in the mission. While communications is an essential function of nonprofits, money spent on traditional phone lines represents dollars that are not being put to work for the community. Time spent administering the phone system, figuring out complex phone bills, or negotiating carrier contracts could be put to better use.

That's why nonprofits are turning to cloud-based communications systems. SIP trunking provides an easy transition from physical phone lines to modern, unified communications platforms. With SIP, nonprofits can cut costs and increase flexibility while providing even better service to the communities that they serve.

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What is SIP Trunking

Session Initiation Protocol (SIP) trunking is an internet-based replacement for traditional physical telephone lines. It serves as the connectivity backbone for a variety of unified communications capabilities using the existing broadband internet connection. A SIP trunk connected to an IP compatible phone system (PBX) allows nonprofit employees to make calls to any phone number worldwide. Each SIP trunk can handle an unlimited number of SIP channels, which can each support one incoming or outgoing telephone call.

The terms SIP trunking and VoIP (Voice Over Internet Protocol) are sometimes used interchangeably, but they are different technologies, just like your physical telephone phone lines and your phone system aren't the same thing. SIP protocol makes it possible to leverage VoIP, but SIP channels can also support web conferencing, high-definition video, text messaging, and faxing.

The Benefits of SIP Trunking for Nonprofits

There are a number of compelling reasons that SIP trunking is so popular in the charitable sector.

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Costs Savings

The use of SIP trunks reduces costs for nonprofits in several ways. First, the organization can get rid of expensive physical telephone lines (PRIs) and the associated long-term contracts and long-distance charges. Many SIP trunking providers offer long-distance calls to most of the US at no additional per-minute charge. Finance directors enjoy the simplicity and predictability of this arrangement. Costs are further reduced because, unlike PRI lines that are sold in groups of 23, nonprofits can order the exact number of SIP channels that they need. If you need 25 concurrent lines, you pay for 25, not 46.

Many nonprofits see telecommunications savings of as much as 50% when they implement SIP trunking.

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Increased Flexiblity

The needs of nonprofits can change seasonally or as they grow. The traditional approach to communications requires predicting your long-term telecommunications needs. This is not necessary with SIP. Nonprofits can easily add or remove SIP channels when needs change, even seasonally. With SIP.US, it is easy for administrators to make changes or cancel channels on-demand.


Streamlined Network Management

For most nonprofits, technology resources are a scarce and expensive commodity. Moving to SIP trunks is a great way to alleviate some of the load. You'll have just one network to manage, rather than separate voice and data networks. This lets your IT team focus on other priorities.


Telemarketing Support

If your organization uses automated dialing for telemarketing, SIP.US can connect you with upstream carriers that welcome this type of traffic without dialer surcharges.

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Disaster Recovery

In the event of a natural or human-made disaster, it may be more important than ever for people to be able to reach your staff. If people can't get into the office, or power is lost at one or more locations, your SIP service can redirect your calls to other offices, mobile phones, or even home landlines. In the case of SIP.US, our data centers are redundant, so a failure at one center won't impact your service at all.

Why Nonprofits Choose SIP.US

While there are many inherent benefits of SIP trunking for nonprofits, it is critical to remember that not all SIP trunking services are the same. Before you decide what's best for the people that you serve, you'll need to compare the features, costs, and support services offered by each provider.  SIP.US is an excellent choice for nonprofits because we make it easy.

  • Easy to Understand Pricing

    Every dollar counts when planning your budget, so we are clear about every fee that you can expect.  Our pricing is straightforward. We charge a low monthly fee for each SIP channel and no setup fees. We also offer low rates for local and toll-free direct dial numbers as well as international calling. All of the cost details are right here.

  • Easy Administration

    Our administrative control panel is streamlined and easy to use, even for people without telecommunications backgrounds. Your team can quickly make moves adds and changes, review call data records, and monitor the health of the system. If you run into something tricky, we are always available to help.

  • Easy PBX Integration

    Our SIP trunks can be used with almost any internet-enabled (IP) phone system, whether it is at your location or hosted by a third party online. We are also compatible with the many free, open-source PBX systems that are popular with nonprofits. If your current phone system isn't internet ready, it may be possible to connect it with an inexpensive adapter.

  • Easy to scale

    With SIP.US you get and pay for exactly the number of SIP channels you need at any time. If you want to add more or cancel some, you can do it whenever you like in the control panel. There are no contracts, and you can maintain as few or as many channels as you need.

  • Easy to try

    You don't have to take our word for it.  We offer 60 minutes of free calling for you to test SIP.US with your equipment in your office. We won't ask for a credit card to get started, and it is easy to set up in just a few minutes. You can give it a try and move forward with confidence.

  • Easy to Trust

    SIP.US utilizes only Tier-1 upstream carriers to route our SIP traffic. These carriers connect directly to the backbone of the internet. This isn't the cheapest option, but we do it to ensure that you get the highest quality voice experience and a redundant network for outstanding reliability and performance.


Probably. If the system is fewer than 10 years old, it is likely IP enabled and ready to go. If you are using a hosted solution, which offers many benefits for nonprofits, SIP trunks are the obvious choice for connectivity. If your IT team wants to keep control over the physical phone system, but still take advantage of new unified communications features, there are inexpensive, or even free, open-source alternatives available. SIP.US is compatible with the most popular including Asterisk and FreePBX.

If you have an older legacy PBX or key system that is not internet-ready, we may still be able to help by using an inexpensive device called an ATA (analog telephony adapter).

Find out how your organization can benefit from SIP trunking by getting your free trial today.

Get Your Free SIP TRUNK in 60 Seconds.

Customer Feedback

Here is what our customers have to say about working with SIP.US.

Simple Interface.

We were able to get our systems up and running with SIP.US in a matter of minutes using the simple online interface.

Matt Harrison

Elevate Audio Visual

Low cost and good!

It’s easy to be low cost, but it’s a lot harder to be low cost AND good! In my opinion, SIP.US should be on anyone’s short list of primary providers.

Michael Dodds


All the tools I need.

The SIP.US Control Panel gives me all the tools I need to add, change and delete phone numbers. I can even order all the DIDs I need and set them up instantly. I love having access to these self-service tools, but I know the support team is also there if I need additional help.

Colin Cook

Thimble River

Up and running in minutes.

We are able to get our Switchvox systems up and running with SIP.US in a matter of minutes using the simple online interface.

Mike Crockett

BITS Technology

Quality support, low price.

I wasn’t sure how to configure my Asterisk system to work with SIP.US. The SIP team was able to remotely access my system and set it up for me. I didn’t expect that level of support for such a low price.

Greg Galvin

The Galvin Law Group

Fast and easy set-up.

I don’t have any experience with SIP trunking, but connecting my Asterisk PBX to SIP.US was fast and easy.

Eddy Pareja

Sangfroid Web Design

Excellent support.

The reason we moved most of our VOIP to you is because of your excellent support. We moved from another provider but your support makes the extra money well worth it.

Brian Marshman

CEO BMI SmartCloud