SIP Trunking

Build your global VoIP system on a private network in minutes with SoundCurve SIP Trunking services.

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SIP Trunking at Scale Starting From $14.99/Mo

SIP Trunking enables companies to run their phone systems via the internet rather than using traditional copper lines and onsite equipment. SounCurve SIP Trunking offers flexibility in telephony management and improves voice quality beyond the PSTN. SoundCurve SIP Trunking solutions are designed to work seamlessly with your onsite PBX with 99.99% uptime.

Get More From Your PBX With SoundCurve SIP Trunking

Guided support

Changing voice providers is a big deal. We work with you to ensure porting is successful.

Reliability and uptime

We connected over 1 million calls last year. We've have the most reliable VoIP network in the industry.

Hassle-free setup

Standards-compliant credentials mean you just copy them into your PBX and you’re done.

Emergency calling

Add an address to your account for in-plan calls to E911 numbers and automated routing to the nearest PSAP for complete compliance with Kari’s Law and the Ray Baum Act.

Automate with APIs

Developer-friendly APIs enable you to automate SIP trunk creation in response to demand, so you never run out of capacity.

Crystal clear conversations

HD Voice for PSTN calls compatible with top US carriers, including Verizon, AT&T, US Cellular, and T-Mobile, is tailored for more natural and immersive conversations.

Ready to modernize your business phones? Let's make it happen!

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sip trunking services

Frequently Asked Questions

What’s the difference between SIP and VoIP?

SIP stands for Session Initiation Protocol, a global standard for controlling multimedia communication in real time, such as audio, video conferencing, and instant messaging.

It’s essential for Voice over Internet Protocol (VoIP) to ensure efficient call routing. Businesses use VoIP as a comprehensive telecommunication system that includes features like call recording.

For those with an IP PBX system, SIP Trunking offers a scalable solution.

What do I need to use SIP Trunking?

To use SIP Trunking, you just need to manage your Private Branch Exchange (PBX) and input your provider’s SIP Trunking credentials to link it to the cloud.

For extra DIDs, toll-free numbers, or call paths, inform us during your quote customization.

How many calls can a SIP Trunk handle?

You purchase call paths, so essentially, your PBX should be able to handle however many call paths you purchase.

How many SIP Trunks do I need?

Typically, each team or location requires just one SIP trunk, but the number of sessions depends directly on how many calls your business expects to handle at the same time.

Is it easy to move phone numbers to SoundCurve?

SoundCurve recommends and supports the use of virtual private networks (VPNs) for additional security, and encourages regular updates and employee training on security best practices. SoundCurve’s proactive approach to security gives businesses the confidence that their VoIP communications are protected against emerging threats.

Why is SIP Trunking better than PRI?

Primary Rate Interface (PRI) is an outdated technology that relies on physical wiring provided by the local telephone company, allowing up to 23 simultaneous calls per circuit.

SIP trunks provide more flexibility than PRI by facilitating calls over the internet, with the number of simultaneous calls limited only by your PBX system and internet bandwidth.

IT professionals prefer SIP trunk services for their ability to fully manage their PBX systems while benefiting from cloud scalability. This eliminates the need for on-site installation and dealing with outdated hardware issues.

How does SIP protocol work?

SIP calls operate like regular phone calls, but require an internet connection and limit you to the number of call paths you’ve bought.