Cloud PBX

The classic telephone system used an ISDN connection (analog before 1994). The end devices were proprietary and connected via conventional telephone wiring. ISDN was discontinued in 2022.

The hybrid telephone system is the traditional manufacturers' response to the growing demand for VoIP and is usually installed locally. Many systems were initially connected via ISDN, while connecting to SIP trunks is often difficult due to limited compatibility. The end devices use data lines but are based on proprietary protocols, which limits device selection to the manufacturer's offerings.

The IP PBX, such as Asterisk, provides a solid foundation for modern IP telephony through standard compliance. However, its design, which is based on local installation per site, along with high maintenance needs and security requirements, poses significant challenges.

The Cloud PBX (Private Branch Exchange), operated on the IP Centrex principle, was developed from the ground up for operation in distributed data centers. It provides all the prerequisites for standard-compliant, flexible, and location-independent IP telephony. Operation, scaling, and security are the responsibility of a specialized telecommunications provider, who manages and delivers the central services.

In the fifth evolutionary stage of the telephone system, a Cloud PBX seamlessly integrates UCC services into a comprehensive communication solution. Companies receive a flexible, location-independent platform that combines telephony, video conferencing, chats, and presence status in a central environment. This integration optimizes collaboration, enhances availability, and enables smooth communication – perfectly tailored to the demands of modern and agile work environments.