SIP Softswitch
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.
Concerning practical implementation, the VoIP gateways have proven to be the best. Many companies are successfully using the IP telephony thanks to its two main characteristics
Decrease in international and long distance call cost expenditures
Stable communications between company’s offices throughout different cities and counties
Dutchphone
Using an existing high-speed Internet connection, NationPhone technology enables anyone to make and receive phone calls - worldwide - with a touch-tone telephone from any country as if they were still at home. Offering quality phone service bundled with e
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