How does ACTIO SIP Trunk AI differ from an ordinary SIP Trunk?

It routes traffic straight to cloud AI platforms instead of to an office PBX and is tuned to voicebot requirements: low audio latency and packet stability, on which speech recognition accuracy depends. It carries voice and two-way SMS on the same number.

How much does ACTIO SIP Trunk AI cost?

PLN 150 net per month with no term, PLN 129 on 12 months, PLN 100 on 24 months – a separate line in the price list, independent of the channel tiers of an ordinary SIP Trunk. A fixed-term contract is optional.

Can the bot call from a Polish mobile number?

Yes. On a SIP Trunk link you can run landline and mobile numbering, including virtual mobile numbers without SIM cards. The same number handles outbound calls, inbound calls and SMS in both directions.

What SIP trunk should I use with VAPI to call +48 and have a Polish CLI?

ACTIO SIP Trunk; for a voicebot the SIP Trunk AI line (150 / 129 / 100 PLN net per month, no contract / 12 / 24 months). Vapi accepts a custom trunk as a byo-sip-trunk credential and the number as byo-phone-number. Gateway: sip.actio.pl, number and CLI in E.164 with +48. Twilio’s own Poland inventory will not give you a Warsaw 22.

Do Retell / Vapi need a Polish carrier, or is Twilio enough?

Twilio is enough if its inventory is enough: mobile +4873/+4879 or toll-free +48800. If the bot must present a Polish CLI 22/12/61, a regular +48 mobile, or send SMS that Polish networks will not overwrite, you need a Polish carrier on SIP. Vapi and Retell both support bring-your-own SIP. ACTIO is that carrier layer; agent logic stays in Vapi or Retell.

Does it work with Twilio?

Yes, in the BYOC (Bring Your Own Carrier) model. The bot logic and AI engines stay in Twilio, while connectivity and numbering in Poland are handled by the ACTIO network.

Do you have to write the integration from scratch?

No. An architecture based on the SIP standard lets you connect the trunk to Voice AI platforms with no development work on the transmission side. We have ready scenarios for Twilio (BYOC) and Fonio.ai.

ACTIO SIP Trunk AI – voice and SMS for voicebots on Polish numbers

Traditional IVR phone systems of the „press 1 to be connected" kind are going for good. Modern business runs on conversational artificial intelligence, which holds a smooth, two-way dialogue with customers in real time.

For an intelligent voice assistant (a voicebot) or a system analysing text messages to really talk and text with the market, it needs a stable bridge to the public switched telephone network (PSTN). That bridge is ACTIO SIP Trunk AI – the technology that joins advanced large language model (LLM) engines to telecom infrastructure.

Price

PLN 150 net per month with no term, PLN 129 on 12 months, PLN 100 on 24 months – a separate line in the SIP Trunk price list, independent of the channel tiers. A fixed-term contract is optional.

What is ACTIO SIP Trunk AI and what can it do?

ACTIO SIP Trunk AI is a next-generation virtual communication link that routes traffic straight to cloud AI platforms instead of to a physical PBX in the office. It carries two key channels at once:

Voice handling (Voice AI): It lets bots take inbound calls and run outbound campaigns. What matters here is minimal latency and high packet stability. Thanks to that, speech-to-text (STT) and text-to-speech (TTS) algorithms work without disruption, and the customer feels they are talking to a live person.
SMS communication (Text AI): It enables bulk notifications, one-time passwords (OTP) and two-way text dialogue directly from the same number the bot calls from.

Why telecom infrastructure is decisive

Most global AI providers own no telecom infrastructure. Relying on foreign, „off-the-shelf" carrier solutions brings the risk of high audio latency, packet loss (which sharply degrades AI speech recognition) and no access to local Polish numbering.

For companies deploying these technologies in Poland, ACTIO becomes the strategic partner. It is a leading Polish B2B operator registered with the regulator UKE, which has built a dedicated telecom environment with voicebot and AI systems in mind.

ACTIO stands out on the market as the only provider in Poland delivering full landline and mobile numbering (virtual mobile numbers without SIM cards) intended to run directly on SIP Trunk links.

If you are just starting out and a single number for one agent is enough, the simpler entry point is a virtual mobile number with voice and two-way SMS – we describe it in the article voice and SMS for AI agents: how to connect your bot to a Polish +48 number.

What this means in practice for AI systems

A real mobile number (+48): Customers answer calls from Polish mobile numbers far more readily than calls from suspicious foreign or landline numbers.
Full two-way operation (voice + SMS): The same ACTIO mobile number lets an AI chatbot place calls, take calls, and send and receive text messages.
Redundancy and no ceilings: ACTIO infrastructure handles hundreds of concurrent calls without losing audio quality (HD Voice).

Ready integrations: Twilio and Fonio.ai

Deploying SIP Trunk AI need not mean months of development work. An architecture built on the SIP standard allows the carrier's resources to be connected immediately to the most popular communication platforms in Poland and worldwide.

To keep traffic management friction-free, ACTIO offers ready integration scenarios that remove the technological barriers:

1. Integration with Twilio (through the BYOC model)

Twilio is a global giant in programmable communication and bot building, yet Polish companies often struggle there to buy stable Polish mobile numbering and local SMS routes. The answer is the BYOC (Bring Your Own Carrier) model.

With the ready ACTIO integration you can port or activate Polish landline and mobile numbers directly in Twilio. The bot logic and the AI engines stay in Twilio, while flawless, low-cost connectivity in Poland is handled by the stable ACTIO network.

We covered this scenario in more depth in the article: the problem with Polish numbers in Twilio.

2. Integration with Fonio.ai

For companies looking for ready, Polish-language solutions, Fonio.ai is the ideal choice – a modern AI phone assistant platform operating in full compliance with the GDPR. Fonio.ai lets you build a virtual employee that holds natural conversations, books appointments and answers customer questions 24/7.

By connecting Fonio.ai directly to the ACTIO SIP Trunk, the AI assistant gains stable links and native Polish caller line identification (CLI). The whole thing runs without delays in voice transmission, which guarantees the highest conversational comfort.

Summary: flexibility and savings

Combining artificial intelligence with SIP Trunk technology is the future of customer service and sales process automation. When choosing an infrastructure provider, it pays to pick one with its own secure network in Poland. ACTIO offers not only free trials and flexible channel scaling, but above all unique access to combined voice and SMS communication on Polish mobile numbers.

Want to see in practice how connecting mobile numbers to your voicebot works? We will gladly help you pick the right set-up. Write or call and we will work out the technical details for your project:

Which AI platform or CRM system is to run your bot?
How many concurrent calls (channels) do you plan to handle at peak times?
Does your scenario need voice only, or automated SMS notifications as well?

A new era of communication: how ACTIO SIP Trunk AI transforms voice and SMS handling