SIP Trunk for Asterisk

Deploying SIP for Asterisk Open Source PBX

Our SIP trunking service supports the Asterisk's open-source PBX solution. Selecting SIP.US as your Asterisk SIP trunk provider will help your business reduce costs while getting a flexible, reliable business phone solution.

Supported Products

About Asterisk

Asterisk is a free open source platform for communications applications. No special hardware is required because Asterisk runs on an ordinary PC.   Asterisk includes IP PBX systems, VoIP gateways, conference servers and other custom solutions. The solution is used by businesses of all sizes in both the private and public sectors worldwide. The solution is sponsored by Digium.

There are currently more than one million communications solutions based on Asterisk in over 170 countries.  It can be used as a complete business phone system or can extend an existing one.

business man use computer meeting team with video call program scaled

Implementing Asterisk

Asterisk IP PBX augments SIP trunking by allowing you to create fully customized communication applications. If you require a communication network that can accommodate a changing system, Asterisk can fulfill your wishes. More than that, they've made sure to make the building process as easy as possible, so you won't spend too much time on constructing the application.

The solution was built for developers by developers is most often implemented by developers or system integrators. If you want to create your own applications and solutions with Asterisk it requires a working knowledge of Linux, script programming, networking and telephony. However, if you do not have that technical expertise available, you can still leverage the flexibility Asterisk offers by using pre-packaged solutions built on Asterisk, or by working with an Asterisk consultant.

Why Choose SIP.US for Asterisk

A phone system includes two high-level components.  First there's the PBX (private branch exchange), in this case Asterisk, which includes call management and additional features like voicemail, automated attendants, call distribution groups and so forth.  The next component is a connection to the Public Switched Telephone Network (PSTN), which routes calls to their intended recipient.  Traditional phone systems use carrier provided PRI (primary rate interface) lines to connect to the PSTN.  SIP is an alternative that leverages a data network, rather than telephone lines, to deliver calls to the PSTN.

Customers choose to deploy SIP trunking with Asterisk for a variety of reasons including:

  • Most companies recognize a cost savings from deploying SIP.US vs. traditional PRI lines
  • SIP.US offers the flexibility to purchase as few as one channel at a time, giving you the ability to pay for only what you need now and grow at any time
  • With SIP.US customers can choose the Internet bandwidth that is most reliable and inexpensive for them
  • SIP.US offers additional features, including as real-time call data records and Nomatic e911
  • We leverage a Tier-1 redundant network to ensure both quality and reliability
  • SIP.US has been tested for use specifically with the Asterisk platform and is leveraged in Asterisk deployments across the country


Guide to Setting Up SIP for Asterisk

There are just a few simple steps required to configure SIP for Asterisk and we've got them detailed in our knowledge base. We're also happy to help if you'd like.

Come to SIP.US if you're looking for a dependable Asterisk provider.

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SIP for Asterisk FAQs

Our service supports any broadband Internet connection. T1-data, Cable, DSL, or Metro Ethernet will all work. Although some SIP providers require you to get connectivity from them, we do not.

Customer Feedback

Here is what our customers have to say about using SIP.US and Asterisk.

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