The CORBA (Common Object Request Broker Architecture) is a widely spread and commonly used distributed computing architecture among an industry. It scales well to different sizes of needs and could be used in wireless embedded devices as well. The most essential in embedded systems is to build lightweight, stable and easily extendable interfaces without endangering compatibility with preceding interfaces. Resources, like amount of memory and processing capacity, are very limited so the interface should be designed and implemented optimally. Services should take concern on limitations of wireless environment, such as slow transfer speed and characteristics of connectless communication. In this work, a CORBA interface for GSM terminal was designed and implemented and it has been found to meet the requirements considerably well. The interface provides the most common services of the GSM network and it is extensible for next products and network technologies. Extensibility is achieved, for instance, by describing properties with a general presentation language like XML (Extensible Markup Language).