The term 'Technical Callers' refers to a job role in which individuals are responsible for providing technical support to customers over the phone. The job requires strong communication and problem-solving skills, as well as knowledge of the product or service being supported. The acronym REFS is used to refer to this job role, which stands for Remote Expert Field Service. This job role is often found in customer service departments, where they provide technical assistance to customers who are having difficulty with their products or services.