Apifonica SIP Trunk

Reliable SIP trunking for modern business telephony

Replace traditional phone lines with a secure, scalable IP connection for your business communications.

Communicate cost-effectively, flexibly and securely with customers and partners worldwide. Our SIP trunk connects your existing PBX or cloud phone system to the public telephone network over the internet, making the move to IP telephony simple and future-ready.

Why choose Apifonica SIP Trunk

About

What is a SIP trunk?

A SIP trunk is a virtual telephone connection that uses your broadband internet connection instead of traditional telephone lines. Multiple voice channels are bundled into a single IP-based connection, allowing calls to be made and received without physical ISDN infrastructure.

The technology is built on the Session Initiation Protocol (SIP), an open IETF standard (RFC 3261) that establishes, manages and terminates voice and multimedia sessions between endpoints. Voice traffic is typically transmitted using the Real-Time Transport Protocol (RTP), with Secure RTP (SRTP) available for encrypted communications. Whether you’re replacing ISDN or expanding an existing VoIP environment, SIP trunking provides a modern foundation for business telephony.

Why us

Why businesses choose Apifonica SIP Trunk

Global coverage from one connection

One SIP trunk gives you local numbers and rates across over 190 destinations, all under a single contract and invoice. Proven across multi-market rollouts: NovaPost runs across 12 European markets with new-market provisioning in under 48 hours, and LPP Group operates across 29 markets on a single trunk.

Lower communication costs

Replace traditional ISDN connections and reduce operating and call costs.

High flexibility

Integrate VoIP and Unified Communications applications into your existing infrastructure using standard SIP interfaces.

Scale whenever you need

Add voice channels, phone numbers and new locations without additional hardware.

Pay only for what you use

Avoid fixed channel packages. Capacity is based on your actual business needs.

Less hardware to manage

Native IP connectivity removes the need for VoIP gateways, simplifying your infrastructure while improving call quality.

Built for the future

A reliable solution for modern IP telephone systems and Unified Communications platforms.

Integration

Easy to integrate with your existing phone system

Apifonica SIP Trunk works with modern cloud telephony platforms as well as on-premises PBX systems.

Network requirements

Hardware requirements

Compatibility

Benefits

Save up to 50% on your phone costs

A reliable service line strengthens customer relationships by making your business easy to reach. Apifonica SIP Trunk supports virtually any SIP-enabled telephone system or endpoint – including Asterisk, 3CX, MS Teams and FreePBX – while giving you full control over channels, locations and routing.

Included benefits

How it works

How Apifonica SIP Trunk works

Connecting your telephone system is straightforward.

01

Connect

Your existing PBX connects securely to the Apifonica Next Generation Network (NGN) through your internet connection. Incoming and outgoing calls are then handled entirely over IP, providing functionality comparable to traditional ISDN connections while benefiting from greater flexibility.

02

Configure

Configuration takes place through the Apifonica cloud communication platform. Simply configure your SIP trunk using your IP address, telephone numbers and login credentials, then enter the same details into your telephone system.

03

Go live

Once connected, the platform displays your connection status so you can begin making and receiving calls immediately.

Benefits

Save up to 50% on your phone costs

Benefits

Why choose Apifonica SIP Trunk

Configure phone numbers directly through your Apifonica SIP Trunk. Advanced routing rules include:

International phone numbers

Need a local presence abroad?

Apifonica offers local phone numbers in over 100 countries, helping businesses establish an international presence while managing everything through a single SIP infrastructure.

Keep your existing phone number

Already have business phone numbers?

We’ll transfer them for you. Number porting is completely free of charge.

Talk to our experts

Schedule a meeting to review your telephony setup and plan your voice infrastructure

After submitting the form, you will receive a response within one business day.

30 minute discovery session

A focused discussion on your current telephony, call volumes and the markets you operate in.

Live platform walkthrough

See how SIP Trunk, Cloud-PBX, ACD and the Voice API work with your existing phone system.

Migration discussion

Review number porting, connection to your PBX or contact centre software and rollout timeline.

Our clients

Trusted by businesses worldwide

Information

Frequently asked questions about SIP Trunk

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Can I use Apifonica SIP Trunk with my existing PBX?

Yes. Apifonica SIP Trunk supports modern SIP-enabled PBX systems. Existing systems can also be connected through a SIP gateway if needed.

How much internet bandwidth do I need?

We recommend around 100 kbit/s upload and download bandwidth for each simultaneous voice channel to ensure high-quality calls.

Can I add more voice channels later?

Yes. Voice channels, phone numbers and business locations can be expanded whenever your requirements change.

Can I keep my existing phone numbers?

Yes. We provide free number porting so you can continue using your current business numbers.

Are there long-term contracts?

No. Apifonica SIP Trunk has no contract term and no minimum spend.

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Scalable voice, zero constraints

Unlock the power of Apifonica SIP Trunk. Get reliable global coverage, easy integration, and full control over your business communication with no minimum spend.