Callisto Enterprise Collection

Enterprise Applications for UCC Solutions

The Most Versatile Application Collection for Enterprise Customers

Professional and efficient customer communication with modern technology is the key to success - this applies equally to small and large companies. Customers today expect a direct and fast service response by phone, email, web, etc. Quick reactions are critical to market success. A well-designed corporate communication process must therefore reflect the communication behavior of customers. A fast and direct response automatically leads to higher customer satisfaction. In order to exploit the full potential of Cisco Unified Communications Manager (UCM/UCME/BEXk/HCS) and Webex in terms of a state-of-the-art solution for internal and external communications, the Callisto platform with the Enterprise Collection offers essential features that extend the capabilities of the base product and enhance their daily processes and workflows in line with the latest findings.

Markets for Callisto Enterprise Collection

The Smart Modules Collection

Besides the PBX solutions and cloud offerings, you can find everything a company needs regarding communication applications in the Callisto Enterprise Collection. Everything is part of the Enterprise Collection, from attendant solutions to team management to fax, call center, or alarming solutions. And if you can’t find the function you need, we will work with you to create a new module or a tailor-made, customer-specific Open Applications Manager (OAM) application.

Each module can be licensed individually and uploaded to the Callisto platform at runtime. Callisto has no limit on the number of modules or users, making it future- and investment-proof. The platform supports up to 960 lines (simultaneous calls) per system.

This is why Callisto is the best choice for you


Over 50 UCC applications available on the Callisto Platform for any vertical market. The all-in-one approach helps end customers and partners to massively reduce the return on investment (ROI).


The ability to add, update, upgrade, or replace Modules or Applications at runtime with no service interruption, makes Callisto the world’s most flexible application platform for UCC solutions. Agile, future proof and secure with Callisto.


Callisto’s unique “Open Applications Management” concept enables customers to upload customized applications to the platform. Enterprises benefit from a fulfillment of their needs and System Integrators can serve customers individually.

Green IT

The Callisto platform can handle up to approx. 1,000 parallel calls with 2‑6 GB RAM, 2‑8 CPUs and 80 GB HD. Partners and end customers profit from a high performance at a lower resource usage, enabling environmental benefits.


Easy to install, configure, manage, use and maintain. Simplicity is a common thread throughout the whole Callisto system. Customers benefit from reduced overall product life cycle costs.


Flexibility in the selection of available modules and interoperability with various soft PBX systems. In addition to that, Callisto is suitable for on-site use, in various cloud or managed service models. We grow with your company.


High quality for products and services is in the DNA of our company. 98% of the installations are running error-free since several years, with more than 25,000 satisfied users and more than 15,000 flawless calls per day prove the stability of the Callisto platform. Customer satisfaction is our daily goal.

Problem Solver

The Callisto application platform has an answer to every UCC need in any vertical market. The variety of 50 applications, and the “OAM” concept for tailor-made applications, are providing a solution for every customer UCC problem.


We stand for professional service and best-in-class Support. Competent sales assistance, consulting, training, customer-specific developments and support, are the praised services by our customers. We have been a stable, reliable and professional partner for over 20 years.

Customer References

  • PB

    Patrick Berg
    Strategic Partner Manager
    POST Luxembourg

    Working with CTModule allowed us to create unique selling points with respect to Cisco’s UCME solution. The rich feature set provided via Callisto Express made it easy for our customer to adhere to our services.
    All in all, working with a human-sized company enabled us to quickly react to market demands while being able to cope with all imaginable customer requirements. CT Module’s Callisto Express plays a major role in the successful proposal of our Managed Services portfolio.

  • CH

    Christian Heine
    Telekom Deutschland

    Our customers appreciate our UCC Premium offering with Callisto.
    All the functions they need are reliable and easy to use. New applications can be added automatically at any time from the large Callisto modules library. Security is very important to our customers. That’s why all components of the UCC Premium offering have been designed strictly in accordance with GDPR guidelines.

  • SB

    Stephan Biekötter
    Telekom Deutschland

    The Callisto applications work reliably and stable.
    Feature requests are developed, implemented and tested in close cooperation with CTModule. In addition to that, we very much appreciate the professional support which CTModule offers for us and our customers.

  • DW

    David Waltermann
    Telekom Deutschland

    Thanks to Callisto’s all-in-appliance concept, ease of installation, the
    platform’s minimal resource requirements, and DW’s intelligent update/upgrade method, our operations team is saving significant time and costs.

Contact us!

We are happy to assist you

Phone: +41 31 531 11 11