NFON SIP Trunking | PBX Modernisation and Cloud Voice Connectivity [Contact](# "Contact") ![](/web-assets/f/290788/40x40/d98615a3ea/nfon-sales-contact.svg) Sales & General * [Talk to Sales](tel:+498000636624) * [Write to us](/en/request-information) Search * [![Products](https://a.storyblok.com/f/290788/40x40/539cd331b9/nfon-products.svg) Products](#) Call & Work ![AI icon](/assets/ai_icon.webp) + [Cloud Telephony](/en/products/cloud-telephony/) + [SIP Trunk](/en/products/enablement/) + [Devices](/en/products/devices) Build & Automate ![AI icon](/assets/ai_icon.webp) + [Assistants](/en/products/ai/assistants) + [Bots](/en/products/ai/bots) + [AI Agent Studio](/en/products/ai/agent-studio) Engage & Support ![AI icon](/assets/ai_icon.webp) + [Contact Center](/en/products/customer-contact/) Integrations & Add ons + [Integrations & Add ons](/en/integrations/) * [![Solutions](https://a.storyblok.com/f/290788/40x40/da156cbbb8/nfon-solutions-industries.svg) Solutions](#) Industries + [Health & Wellness](/en/solutions/health-wellness) + [Retail & E-Commerce](/en/solutions/retail) + [Finance & Legal](/en/solutions/finance-insurance) + [Travel & Hospitality](/en/solutions/hospitality) + [Public Sector](/en/solutions/public-sector) + [Energy](/en/solutions/energy) + [Emergency Services](/en/solutions/emergency-services) Success stories + [Customer Stories](/en/customer-stories/) * [![Partnerships](https://a.storyblok.com/f/290788/36x36/7bd105c67d/nfon-partner.svg) Partnerships](#) Partner with NFON + [Become a partner](/en/partner/become-partner) + [NGAGE](/en/partner/partner-programme) Partner Portal + [Partner Portal](https://partners.nfon.com/) * [![Help Centre](https://a.storyblok.com/f/290788/40x40/d01fbb4f30/help-nfon.svg) Help Centre](/en/help-center) * [Login](https://start.cloudya.com/ "Login") * International + [International](/en/products/enablement) + [Deutschland](/de/produkte/enablement) + [España](/es/productos/enablement) + [France](/fr/produits/enablement) + [Italia](/it/servizi/connessione-cloud) + [Österreich](/at/produkte/enablement) + [Polska](/pl/produkty/enablement) + [Portugal](/pt/produtos/enablement) + [United Kingdom](/gb/products/enablement) [![NFON Logo](/assets/logo-nfon.svg)](/en/ "NFON Home") * [Products](#) ![](/web-assets/f/290788/36x36/a9f3ceed6f/nfon-call-work.svg) Call & Work ![AI icon](/assets/ai_icon.webp) Seamless communication ![](/web-assets/f/290788/36x36/d03c61cf40/nfon-build-automate.svg) Build & Automate ![AI icon](/assets/ai_icon.webp) AI Automation ![](/web-assets/f/290788/36x36/106823b73b/nfon-engage-support.svg) Engage & Support ![AI icon](/assets/ai_icon.webp) Omnichannel support ![](/web-assets/f/290788/36x36/50b60f5411/nfon-integrations-add-ons.svg) Integrations & Add ons Connect Teams & CRMs + [![](/_astro_rebrush/products-call-work-cloudteleophny-navbar-int_Z1Ha6T9.webp) ### Cloud Telephony ![AI icon](/assets/ai_icon.webp) Seamless cloud telephony for every device. High-fidelity audio with European-grade security.](/en/products/cloud-telephony/) + [![](/_astro_rebrush/products-call-work-siptrunk-navbar-int_Z2uvltH.webp) ### SIP Trunk Secure cloud connectivity for your existing hardware. Scales instantly with your business.](/en/products/enablement/) + [![](/_astro_rebrush/products-call-work-devices-navbar-int_2ju67a.webp) ### Devices Professional telephones and hardware designed for clear calls and all-day comfort.](/en/products/devices) + [![](/_astro_rebrush/products-build-automate-assistants-navbar-int_Z2qwO4A.webp) ### Assistants ![AI icon](/assets/ai_icon.webp) Pre-configured, plug-and-play digital roles like FrontDesk and Workdesk. Ready to deploy instantly with zero coding required.](/en/products/ai/assistants) + [![](/_astro_rebrush/products-build-automate-bots-navbar-int_Z2heEGG.webp) ### Bots ![AI icon](/assets/ai_icon.webp) Prompt-driven, multi-channel conversational experiences. Automate custom customer journeys across Web Chat, Voice, and Livechat.](/en/products/ai/bots) + [![A chatbot creation interface is shown with a readiness message, build report, agent prompt details, and created tools list, over a gradient background.](/_astro_rebrush/products-build-agent-studio-navbar-int_1y7RQB.webp) ### AI Agent Studio ![AI icon](/assets/ai_icon.webp) Simply turn your ideas into AI agents for your business. Describe the task, create a working agent, then optimize it in one workspace.](/en/products/ai/agent-studio) + [![](/_astro_rebrush/products-engage-support-navbar-int_tctp9.webp) ### Contact Center ![AI icon](/assets/ai_icon.webp) Omnichannel customer service for modern teams. Manage conversations, automation, AI assistance, and customer context.](/en/products/customer-contact/) + [![](/_astro_rebrush/products-integrations-addons-navbar-int_OchUd.webp) ### Integrations & Add ons Expand your capabilities and natively connect your everyday business to keep all workflows unified.](/en/integrations/) * [Solutions](#) ![](/web-assets/f/290788/40x40/da156cbbb8/nfon-solutions-industries.svg) Industries Tailored solutions ![](/web-assets/f/290788/40x40/155f2a989d/nfon-success.svg) Success stories 54,000+ trust us + [![](/_astro_rebrush/solutions-health-wellness-navbar-int_uk0rt.webp) ### Health & Wellness Secure communication for better patient experiences and care delivery.](/en/solutions/health-wellness) + [![](/_astro_rebrush/solutions-retail-ecommerce-navbar-int_QAkgA.webp) ### Retail & E-Commerce Connected communication for modern retail and customer engagement.](/en/solutions/retail) + [![](/_astro_rebrush/solutions-finance-legal-navbar-int_1WrMvJ.webp) ### Finance & Legal Trusted communication for regulated and security-conscious organizations.](/en/solutions/finance-insurance) + [![](/_astro_rebrush/solutions-hospitality-travel-navbar-int_fQhJw.webp) ### Travel & Hospitality Seamless communication for exceptional guest experiences and service.](/en/solutions/hospitality) + [![](/_astro_rebrush/solutions-publicsector-navbar-int_1kngVV.webp) ### Public Sector Reliable communication for responsive public services and citizen support.](/en/solutions/public-sector) + [![](/_astro_rebrush/solutions-energy-navbar_8iqT.webp) ### Energy Reliable communication for responsive customer service, even during outages and peak demand.](/en/solutions/energy) + [![](/_astro_rebrush/solutions-emergency-navbar_2i71dp.webp) ### Emergency Services Reliable communication for urgent enquiries, fast routing and clear follow-up.](/en/solutions/emergency-services) + [![](/_astro_rebrush/solutions-costumerstroy-navbar-int_Z1gqryq.webp) ### Customer Stories Real-world impact across every industry. Explore how we solve complex communication challenges for Europe’s leading brands.](/en/customer-stories/) * [Partnerships](#) ![](/web-assets/f/290788/36x36/7bd105c67d/nfon-partner.svg) Partner with NFON Join the NFON network ![](/web-assets/f/290788/36x36/8c5c9a9c78/nfon-partner-portal.svg) Partner Portal Existing partner login + [![](/_astro_rebrush/partnerships-partner-navbar-int_Z2lwB0a.webp) ### Become a partner From onboarding to co-branded marketing, we provide the tools you need to win.](/en/partner/become-partner) + [![](/_astro_rebrush/partnerships-ngage-navbar-int_Zg6kkm.webp) ### NGAGE Discover our tiered rewards system designed to help you scale your business and revenue.](/en/partner/partner-programme) + [![](/_astro_rebrush/partnerships-partnerportal-navbar-int_1f2qlj.webp) ### Partner Portal Access partner tools, deal registration, training resources, and program benefits in one place.](https://partners.nfon.com/) * [Help Centre](/en/help-center) * Search * [Login](https://start.cloudya.com/ "Login") * en + [International](/en/products/enablement) + [Deutschland](/de/produkte/enablement) + [España](/es/productos/enablement) + [France](/fr/produits/enablement) + [Italia](/it/servizi/connessione-cloud) + [Österreich](/at/produkte/enablement) + [Polska](/pl/produkty/enablement) + [Portugal](/pt/produtos/enablement) + [United Kingdom](/gb/products/enablement) * [Contact](#) [Contact](# "Contact") + ![](/web-assets/f/290788/40x40/d98615a3ea/nfon-sales-contact.svg) Sales & General Get in touch with us. ![](/_astro_rebrush/getstarted-talktosales-navbar-int_2pTsIF.webp) ### Talk to Sales Get a free consultation to see how NFON products can meet your needs. [+49 8000 – 63 66 24](tel:+498000636624 "+49 8000 – 63 66 24
") ![](/_astro_rebrush/getstarted-writetous-navbar-int_2o80yC.webp) ### Write to us Fill out our request form. Our experts will respond as soon as possible. [Write to us](/en/request-information "Write to us") ☎︎ **We’re here for you by phone** The current Microsoft 365 disruption may cause delays in email communication. Calling us is currently the quickest and easiest way to get in touch. [+498006366555](tel:+498006366555) INFRASTRUCTURE MODERNIZATION # SIP Trunking. Keep your PBX. Move your voice into the cloud. Transition your on-premise PBX into the digital age and build the foundation for AI-ready communication. NFON provides the secure, flexible connectivity your legacy systems need to thrive in a cloud-first world. Crystal-clear voice, Europe-wide reach, and absolute reliability. [Talk to an infrastructure expert](/en/request-information "Talk to an infrastructure expert") [Explore SIP Trunking](/en/products/enablement/sip-trunk-flexx "Explore SIP Trunking") * ![](/_astro_rebrush/hermes-logo_Z1KD6CO.svg) * ![](/_astro_rebrush/itsc-logo_Z27MroC.svg) * ![](/_astro_rebrush/hilti_logo_Ob6Tr.svg) * ![](/_astro_rebrush/sos-kinderdorf_logo-1_Z1qfhdC.svg) * ![](/_astro_rebrush/teambank-logo_Z1ABs7o.svg) * ![](/_astro_rebrush/fressnapf_logo_Z1v0bqs.svg) * ![](/_astro_rebrush/vienna-house-logo-1_17JXts.svg) * ![](/_astro_rebrush/tchibo-logo_Z1xrVBE.svg) * ![](/_astro_rebrush/ewe-netz-logo_Z281yx8.svg) * ![](/_astro_rebrush/steinway_and_sons_logo_Ze6mLr.svg) * ![](/_astro_rebrush/t-mobile_logo_2022-1_ZnTY9A.svg) * ![](/_astro_rebrush/remondis-logo_1jARNP.svg) * ![](/_astro_rebrush/logo_rewe_Z1ht3mN.svg) * ![](/_astro_rebrush/swb-logo_oRWCw.svg) * ![](/_astro_rebrush/fraglovis-logo_Z8BMAP.svg) * ![](/_astro_rebrush/cewe-logo_1qmy5C.svg) * ![](/_astro_rebrush/hermes-logo_Z1KD6CO.svg) * ![](/_astro_rebrush/itsc-logo_Z27MroC.svg) * ![](/_astro_rebrush/hilti_logo_Ob6Tr.svg) * ![](/_astro_rebrush/sos-kinderdorf_logo-1_Z1qfhdC.svg) * ![](/_astro_rebrush/teambank-logo_Z1ABs7o.svg) * ![](/_astro_rebrush/fressnapf_logo_Z1v0bqs.svg) * ![](/_astro_rebrush/vienna-house-logo-1_17JXts.svg) * ![](/_astro_rebrush/tchibo-logo_Z1xrVBE.svg) * ![](/_astro_rebrush/ewe-netz-logo_Z281yx8.svg) * ![](/_astro_rebrush/steinway_and_sons_logo_Ze6mLr.svg) * ![](/_astro_rebrush/t-mobile_logo_2022-1_ZnTY9A.svg) * ![](/_astro_rebrush/remondis-logo_1jARNP.svg) * ![](/_astro_rebrush/logo_rewe_Z1ht3mN.svg) * ![](/_astro_rebrush/swb-logo_oRWCw.svg) * ![](/_astro_rebrush/fraglovis-logo_Z8BMAP.svg) * ![](/_astro_rebrush/cewe-logo_1qmy5C.svg) * ![](/_astro_rebrush/hermes-logo_Z1KD6CO.svg) * ![](/_astro_rebrush/itsc-logo_Z27MroC.svg) * ![](/_astro_rebrush/hilti_logo_Ob6Tr.svg) * ![](/_astro_rebrush/sos-kinderdorf_logo-1_Z1qfhdC.svg) * ![](/_astro_rebrush/teambank-logo_Z1ABs7o.svg) * ![](/_astro_rebrush/fressnapf_logo_Z1v0bqs.svg) * ![](/_astro_rebrush/vienna-house-logo-1_17JXts.svg) * ![](/_astro_rebrush/tchibo-logo_Z1xrVBE.svg) * ![](/_astro_rebrush/ewe-netz-logo_Z281yx8.svg) * ![](/_astro_rebrush/steinway_and_sons_logo_Ze6mLr.svg) * ![](/_astro_rebrush/t-mobile_logo_2022-1_ZnTY9A.svg) * ![](/_astro_rebrush/remondis-logo_1jARNP.svg) * ![](/_astro_rebrush/logo_rewe_Z1ht3mN.svg) * ![](/_astro_rebrush/swb-logo_oRWCw.svg) * ![](/_astro_rebrush/fraglovis-logo_Z8BMAP.svg) * ![](/_astro_rebrush/cewe-logo_1qmy5C.svg) ![](/_astro_rebrush/sip-productpage-hero-international-mobile_Z1emWRd.webp) ![](/_astro_rebrush/sip-productpage-hero-international_Zs5Mx2.webp) ![](/_astro_rebrush/sip-legacyintegration-productpage-imagetext-international_Z12DrdQ.webp) LEGACY INTEGRATION ## Modernise, don't replace. Extend the life of your existing PBX investment while gaining the cost-efficiency of VoIP. Our SIP trunks integrate seamlessly with your current setup, providing an instant gateway to modern communication. ![](/_astro_rebrush/sip-europeanconnectivity-productpage-imagetext-international_ZGu3L6.webp) EUROPEAN CONNECTIVITY ## Europe-wide connectivity. One trunk. Consolidate your communication infrastructure across multiple locations. Whether you’re in one city or across the continent, manage your entire network through a single, unified carrier. ![](/_astro_rebrush/sip-networktransition-productpage-imagetext-international_bTnlS.webp) NETWORK TRANSITION ## Scale communication without added complexity. Add users, locations, and phone numbers easily while reducing infrastructure costs and simplifying telephony management across your entire communication environment. ![](/_astro_rebrush/sip-connectedecosystem-productpage-imagetext-international_ZBru6y.webp) Connected ECOSYSTEM ## Certified compatibility. Open integrations. Connect your on-premise systems to Microsoft Teams\*, Genesys Cloud, and NFON Contact Center. We provide the PSTN bridge that makes your existing tools smarter and more connected. ![](/_astro_rebrush/sip-legacyintegration-productpage-imagetext-international_Z12DrdQ.webp) ![](/_astro_rebrush/sip-europeanconnectivity-productpage-imagetext-international_ZGu3L6.webp) ![](/_astro_rebrush/sip-networktransition-productpage-imagetext-international_bTnlS.webp) ![](/_astro_rebrush/sip-connectedecosystem-productpage-imagetext-international_ZBru6y.webp) [Book a non-binding consultation](/en/request-information "Book a non-binding consultation") THE CONNECTIVITY ADVANTAGE ## Why industry leaders anchor their voice on NFON SIP Trunk. ![](/_astro_rebrush/uptimearchitecture-productpage-en_Z2duD15.webp) ### 99.9% Uptime architecture. Hosted in geo redundant T3+ data centers with built in redundancy and failover protection to keep business communication running without disruption. ### Encrypted by default. End to end SRTP/TLS encryption and secure European infrastructure protect every conversation, connection, and communication flow by default. ### Certified, not just Compatible. Tested and certified with leading PBX vendors for seamless integration, reliable interoperability, and frictionless deployment. [Discover all functions](/en/products/enablement/sip-trunk-flexx "Discover all functions") Interoperability & trust ## Rigorous certification. Total transparency. Your existing infrastructure is an investment. We have tested and certified the world’s leading PBX and hardware manufacturers to ensure 100% feature transparency and carrier-grade stability across your entire network. ![](/_astro_rebrush/agfeo_2sh09F.webp) ![Auerswald logo](/_astro_rebrush/auerswald_2bXQLd.webp) ![Innovaphone logo](/_astro_rebrush/innovaphone-logo_Z1ocJtm.svg) ![Starface logo](/_astro_rebrush/starface_Z1sEM2M.webp) ![Yeastar logo](/_astro_rebrush/yeastar_Z1etHNN.webp) VERTICAL SOLUTIONS ## Tailored for every sector. From retail and healthcare to manufacturing and finance, our solution adapts to your specific workflow and compliance requirements. [Customer stories](/en/customer-stories/ "Customer stories") [![](/_astro_rebrush/insurance-industries-image-international_2mSN1B.webp) Insurance Insurance Report claims, verify identities securely, and resolve customer issues with clear updates at every step.](/en/solutions/finance-insurance) [![](/_astro_rebrush/public-sector-industries-image-international_1G3pDY.webp) Public sector Public sector Ensure citizens reach the right department, get clear information, and resolve requests without delays.](/en/solutions/public-sector) [![](/_astro_rebrush/healthcare-industries-image-international_dBLIL.webp) Healthcare Healthcare Handle appointment requests, patient inquiries, and routine communication while giving teams more time for care.](/en/solutions/health-wellness) [![](/_astro_rebrush/travel-and-hospitality-industries-image-international_Z23EyFh.webp) Travel & Hospitality Travel & Hospitality Handle bookings and guest requests with seamless communication across the entire guest journey.](/en/solutions/hospitality) [![](/_astro_rebrush/retail-industries-image-international_Z1CVVgH.webp) Retail & E-commerce Retail & E-commerce Manage product questions, deliveries, and returns with fast, consistent communication at any scale.](/en/solutions/retail) INDUSTRY INSIGHT ### What is SIP Trunking? SIP Trunking is a VoIP-based technology that replaces traditional physical phone lines (ISDN) with a virtual connection over the internet. It allows your on-premise PBX to send and receive calls digitally, offering greater flexibility, lower call charges, and simplified number management. [View our Knowledge Base](https://www.nfon.com/en/get-started/cloud-telephony/lexicon/knowledge-base-detail/sip-trunk/ "View our Knowledge Base") ![](/_astro_rebrush/what-is-cloud-telephony-productpage-en_1vG35D.webp) \*Microsoft Teams is a trademark of the Microsoft Group. ![](/_astro_rebrush/banner-450-x-800-mobile_ZIOii4.webp) ![](/_astro_rebrush/banner-1440x400_8iM5V.webp) ## Ready to get started? Let's do this. 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