The Callisto solution is more than just an enterprise solution: European telecommunications carriers are using the Callisto system as a pivotal point within their managed services product range. Callisto Express represents one of the primary central interfaces beneficial to the customer and thus ideal for the carriers' product branding platform. The rent system appears to be a single unit. This improves the competence reference of the service provider towards their customers. Trust grows  Callisto Express is offered as an OEM product to managed service providers, with their own label, own web interface design. This way, when there are questions, the customer gets the proper contact information right away.

The many, rich Callisto features in the area of PABX controlling, the smart backup concept, and the remote control and support possibilites are the key to a service provider offering a successful managed service.