The services provided by professionals in particular field. For example, a company may charge a certain sum of money for the certain tasks their consultant accomplished for the company who ordered the service.
During last several years the Softswitch technology has been actively discussed. New and traditional operators, including the operators of the IP telephony, test Softswitch systems, considering them from the point of view of wide use in communication networks and at the same time improving the technical background for the implementation of such systems.