Multiple call arrangement - allows the user to receive several calls simultaneously, even if they came by the same line. This stops the redirection of incoming calls directly to voice mail in case the line is busy or if the user is already involved in an active call.
The SIPMarket Trade System allows to make phone calls via the Internet at wholesale prices. The intellectual system for choice of an operator automatically forms a list of the most profitable gateways for the requested destination at every call. Moreover,
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