A call center agent accepts incoming calls or makes outgoing calls for a business in a call center. These calls may be for a variety of situations, such as customer service, sales calls, product instructions, and billing inquiries. You may be responsible for taking orders, handling customer complaints, and answering questions from callers. In sales jobs, your duties may also include setting appointments and making product sales. Many call center agents are promoted to inside sales or other jobs after excelling at their work in the call center.