It is a device capturing and controling all the signals, which are being created by the whole system, especially the made and received phone call signals. The device is mostly used for connecting regular phone system with the Internet and backwards.
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.