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.
Integration of the phone set (cell or land line) into the company phone system. For instance, if it is impossible to find a person by the office phone, then with the help of the integrated cell phone one can set a call redirection to a cell or another telephone number, in case if that telephone is also unavailable the call will be redirected to a voice mail.