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SIP Trunk Provider

SIP Trunking to use for your own PBX

SIP Trunking is ideal for all businesses small or large, who need multiple phone lines and have an on-site PBX. Implementing SIP Trunking will provide several advantages, helping you grow your business!

Cost savings

SIP trunks cost less than traditional analog phone lines, particularly for long-distance and international calls, which results in significant savings on communication expenses.

Call Quality

Our SIP trunks are designed to ensure that your digital phone connections have ample bandwidth to make high-quality calls. Expect clear calls even during busy periods.



Our SIP trunks are not limited to a local exchange. This means you can obtain local numbers in any geographical area and you can seamlessly take your numbers with you.

The ultimate SIP trunk service

to suit businesses of all shapes and sizes

If you manage your own PBX, a Stripe 21 SIP trunk establishes a connection between your system and the external communication network.


SIP trunks can be easily scaled up or down to accommodate changing business needs. This flexibility makes it straightforward to adjust your communication setup as your company grows or experiences fluctuations in call volume.

Peace of mind

Local and Global Presence

With SIP trunks, you can obtain local phone numbers in various regions, regardless of your physical location. This enables your business to establish a local presence in multiple areas, which can be beneficial for customer engagement.

Multi 10Gb Network


SIP trunks allow you to consolidate various communication services (voice, video, messaging) onto a single platform. This integration streamlines management and enhances overall efficiency.


Quality and Reliability

SIP trunks can provide high-quality voice and video communication, particularly when used over a reliable internet connection. Additionally, they can dynamically adapt to network conditions, helping maintain call quality.

Technology on Demand

Unified Communications

SIP trunks can be integrated with Unified Communications (UC) systems, allowing for seamless communication across various channels and devices.



SIP trunks enable remote and mobile work capabilities. Employees can access company communication services from virtually anywhere with an internet connection.

Centralised Management

Once set up, managing a SIP trunking system is generally straightforward and can be centralized, simplifying administrative tasks.

24/7 Support


As technology evolves, SIP trunks are well-suited to adapt to new communication protocols and advancements.

SIP trunks offer you a modern and flexible solution for your communication needs, enhancing cost-efficiency, scalability, and the ability to deliver effective communication experiences to your customers and employees.

Start with 4 channels and add more as required.
Pay for calls using our cheap call rates or buy a bundle.
Add incoming phone numbers.
Premium UK-based support.
Quick and easy setup.

The next step, made easy.

What are SIP Trunks?

How secure are Stripe21’s SIP Trunks?

Can SIP Trunking from Stripe21 replace traditional phone lines?

Is Stripe21’s SIP Trunking environmentally friendly?

How does Stripe21 ensure compliance with SIP Trunking?

What support does Stripe21 offer for SIP Trunking?

How does SIP Trunking from Stripe21 scale with business growth?

Why choose Stripe21 as a SIP Trunk provider?

How does SIP Trunking integrate with unified communications?

Are there long-term contracts with Stripe21’s SIP Trunking?