We developed MCE third-party, universally maintainable control equipment based on a simple premise: Elevator service contractors should be selected and retained based on customer satisfaction, not access to a service tool. MCE imposes no restraints on the ability to service and maintain our elevator control systems. All MCE products are non-proprietary. As such, parts are available for inventory ( not just exchange) . Diagnostics are built in. No proprietary service tool is required for any adjustment or maintenance procedure. All manuals and drawings are provided. Technical training, engineering, and technical support are available to all. MCE provides direct support to the � end user� and their designated maintenance company.