Based on a modular and distributed architecture, the Ericsson MD110 provides the foundation for a unified network that supports integrated voice, data and multimedia applications. Because of its distributed architecture, the Ericsson MD110 provides a high degree of fault tolerance and excellent scalability, from a few hundred to 35,000 or more users in an office ,campus or enterprise environment. Full mobility is supported in any configuration and across multiple locations.

Ericsson's MD110 stands out as an exceptional system that prepares you for the future while providing a cost-efficient solution for today's business communication needs. Whatever your requirements, today or tomorrow, there is an MD110 system that will exceed your expectations. Today, there are more than 12 million business users who reply on the MD110 and who have placed their confidence in Ericsson to protect their investment in the future through continuous system enhancements.

A PBX is no longer a standalone system for voice communications. Today's business need a unified network for both voice and data is an integrated part of a larger communications infrastructure. The MD110 is unique in providing a truly open platform that supports all major existing and emerging standards and powerful network management functions to provide the ultimate in flexibility in supporting the flow of all types of information into and out of our organization.

The Processor Switch Module (PSM) uses its own control system and switch and works as an autonomous system or as integrated part of a larger system. One PSM can have up to 3 interface modules (IFM) and then support up to 640 extensions (traffic and configurations depending). Larger systems are built by simply adding processing and switching capacity (PSMs and IFMs) as the system grows. In this way, integrated systems with more than 20.000 extensions and full feature transparency can be built.

The use of universal hardware and software in the MD110 makes reconfiguration and expansion of the system easier and less expensive.

In addition, each PSM is capable of autonomous operation if the feature link to the rest of the system fails.

The MD110 software is divided into central and regional operating segments. Each PSM contains all the necessary regional software to ensure complete control of intra-PSM call processing.

Communication between PSMs in controlled by central software, which is accessed as required by the originating PSM. The central software is duplicated in several PSMs for added reliability.

The modular structure of the MD110 system in combination with the unique advantages of distributed processing enable Ericsson to supply systems precisely tailored to customer requirements and the physical layout of their organizations.

The MD110 PBX has no predefined system configuration. Instead, users can build up an integrated voice and data network using standardized elements (modules). Processing power (PSMs) and capacity (PSM/IFM) can be loaded where they are needed, to suit users’ unique communication requirements.