Phone to Phone
It is a type of communication between two ordinary phones, which are connected and voice transmits over telecommunication network.
It is is considered as one of the most prominent entity in the VoIP world. Company Digium has created it as a fully innovative approach to telecommunications. This company has delivered such software that enables people to configure a server and start to make calls.
Heswick
Heswick is a company that works for a number of years in Telecommunications developing hardware and software solutions dedicated to telephony services management.
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