Allows users tracking the condition of the other telephone or the subscriber, for example, there will appear a signal on the screen of the telephone device informing that the subscriber is on the line and is temporarily unavailable.
Fusion Telecom Sol Inc
Big Allo is a global provider of Internet telephony services.Using any of our products, you can place and receive calls through any Big Allo product via the Internet by using Voice over Internet Protocol (VoIP) technology. Through its cutting-edge solutio
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