Gamma markets its SIP trunk with ALE's Rainbow Hub, connecting the cloud to the telecommunications network
Colombes, France, November 18, 2025 – Alcatel-Lucent Enterprise, a leading provider of secure networking and communication solutions that enable organizations and industries to accelerate their operational efficiencies and competitiveness, and Gamma Communications GmbH (“Gamma”), a specialist in high-performance IP communications and SIP trunking, are expanding their strategic partnership. As part of this collaboration, ALE has certified Gamma's SIP trunk for its Rainbow™ cloud communications platform. Customers and partners will benefit from seamless integration and reliable accessibility via the public telephone network directly from the ‘Rainbow Hub’, which is a full public cloud solution that unifies collaboration and telephony in one platform. It combines real-time communication (voice, video, and messaging) with PSTN traffic, providing businesses with a comprehensive, enterprise-grade service.
Gamma is an ITC provider based in Hof, Germany, that operates across Europe. It delivers customized solutions for business customers in the areas of IP telephony and internet connectivity. Its offerings range from high-performance SIP trunks to stable DSL and fiber optic connections, all of which are designed for the highest quality, maximum reliability, and flexible scalability.
“Rainbow Hub, powered by Gamma”, is now available as a certified, highly available connection to the public telephone network. Customers can book this SIP trunk option directly through the Rainbow interface.
Certified, integrated, and future-proof
The certification confirms the complete technical compatibility of the Gamma SIP trunk with Rainbow Hub – including direct provisioning via the ALE backend. As a result, customers and partners enjoy a stable connection that can be activated immediately. The solution is also flexibly scalable, making it suitable for demanding UCaaS (Unified Communications as a Service) applications.
Native integration allows voice services and real-time communication to easily fit into existing business processes and applications. The joint solution is initially available in Germany and will be available in other countries in the future.
With Gamma, we are gaining a technology partner that delivers SIP communication at the highest availability level. The Gamma SIP trunk complements our Rainbow platform with a reliable, seamlessly integrated voice solution that offers real added value to our partners and customers.
The certification of our SIP trunk for Rainbow Hub is a strategic milestone. It enables partners to have a highly available connection where we control the technology ourselves, without any upstream service providers. We are delighted to expand our successful collaboration with Alcatel-Lucent Enterprise in this targeted manner.