A call center is a business entity or organization that is engaged in selling tele-calling services to clients. Call centers are primarily divided into two types –outbound call centers and inbound call center. An inbound call center has processes that manage incoming telecom calls. On the other hand, an outbound call center makes outgoing calls to customers or prospective customers. In the past few years, there has been a rapid growth in the call center industry and most organizations outsource their back office operations to third party service providers. However, in some cases organizations decide to develop their own in-house call centers to have more control over the process and quality. Such call centers are called captive call centers.