Call Center is a central location for the collection and distribution of all relevant information, an essential part of the strategy of advanced customer relationship systems. Call center is a technology solution for the efficient and effective communication with a large number of users, and serving incoming entities in the system call center. This paper shows how and in what way does the call center T-COM company, and what is to be achieved with the implementation of call centers. Shown is the way in which employees and their supervisors used CRM system as part of the call center, and how and in what manner the application of such systems business easier and faster increases easier and faster users satisfaction, its degree of loyalty and profite, and what and how much is the benefit of the Company with the CRM application systems business. It explains the procedures and requirements that must be met for a business call center and CRM system, and has shown what it means to be a costumer in today's business world and how the grantee and the importance of customers for the overall business and brand image of the company.