Call center - is a center of taking care of calls, centralized office, used for receiving and forwarding high volumes of information, incoming by the way of phone calls. By type of organization call centers are divided into three categories: corporate, outsourcing and call center by demand. Choice of category and VoIP services firstly is based on defining the tasks, functional requirements and possibilities of managing the work flow of a call center.
For one time advertising promotions or typical requests it is easier to use services of the outsourced call center. Main advantage of such a service is that the company who rents it is free from the necessity of keeping the operators and organizing their work flow.