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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.
VoIPstudio
Fully featured business telephone system with instant telephone numbers in 50 countries.
Read moreTop countries:
United States 1294
India 440 United Kingdom 425
Canada 348
Bangladesh 338
China 142
Pakistan 134
Australia 133
Spain 123
Russia 114View all countries