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Legacy to Current-Day Telephone Networks
Published in Stephan S. Jones, Ronald J. Kovac, Frank M. Groom, Introduction to COMMUNICATIONS TECHNOLOGIES, 2015
Stephan S. Jones, Ronald J. Kovac, Frank M. Groom
PABX, also known as PBXs, in its simplest configuration can be viewed as a specialized computer that is used to connect inbound voice traffic to the appropriate destination, route outbound calls to available trunks, and allow station-to-station communication. PABX is characterized by feature-rich offerings that process voice calls. They are used to consolidate numerous internal users to a reduced set of trunks connected to the PSTN. Peripheral and system-supported services such as voice processing, station message detailed recording (SMDR), automatic call distribution (ACD), and least-cost routing (LCR) have been created to handle and record call traffic in a highly efficient manner.
Network Technology and Methodology
Published in Fred Huffman, Practical IP and Telecom for Broadcast Engineering and Operations, 2013
Circuit switching and routing is the basis for all domestic and international telephone or voice grade, dial-up traffic. The circuit switching function is distributed between end-office switching systems and network switching systems. End office switching systems may be a private branch exchange (PBX) physically located on subscriber premises, or a partition in the telephone company’s nearest office, commonly referred to as centrex service. Network switching systems include the local serving central office and any other systems facilitating a path for a telephone call. Nowadays, these systems range in size from a few thousand to hundreds of thousands of ports capable of handling millions of calls per hour.
Design and implementation of a VoIP PBX integrated Vietnamese virtual assistant: a case study
Published in Journal of Information and Telecommunication, 2023
Hai Son Hoang, Anh Khoa Tran, Thanh Phong Doan, Huu Khoa Tran, Ngoc Minh Duc Dang, Hoang Nam Nguyen
Most traditional media, including telephones, music, movies, and television, have in recent years been digitized for transmission over the Internet. VoIP refers to a group of technologies, communication protocols, and transport techniques for delivering voice and multimedia over an Internet protocol network. Since Skype was released, many people have come to realize the convenience of voice and data transfer over the network. Indeed, since the mid-1990s, telephone equipment manufacturers have been adding IP capabilities to their existing PBX telephone switches. VoIP phones now offer an alternative to traditional telephony. As VoIP technology matures, achieving better quality of service (QoS) with VoIP has been increasingly studied (Chakraborty et al., 2019).