• The electronic private automatic branch exchange (EPABX) is equipment that has made day-to-day working in the offices much simpler, especially in the area of communication. The EPABX may be defined as a switching system that makes available both internal and external stitching functions of any organization. The selection of an EPBAX is a difficult task and requires deep knowledge of traffic pattern of the office. By using an EPABX both the internal and external needs of the organization are fully served. With the advent of powerful microprocessors and advancements in the field of computers, the EPBAX can boast of versatile features. Hotline can be established between the boss and his immediate subordinates.