The term is an acronym for Private Branch eXchange. A PBX, sometimes known as a telephone switch or phone switching device, is a system that connects office telephone extensions with the public network.
Our company uses an IP PBX as a communication server.
Call accounting is software or hardware that provides metrics for telephony functions such as traffic analysis, toll fraud alerts, network management and cost allocation to various departments. There are countless call accounting vendors that tout their various features and niches. Some specialize in professional bill back, others focus on the unique requirements of hospitality environments and others offer generic solutions for general business requirements
I use call accounting software to keep track of misuse and abuse of telephone calling.
IPDR.org is an open consortium of leading service providers, equipment vendors, system integrators, and billing and mediation vendors collaborating to facilitate the exchange of usage and control data between network and hosting elements and operations and business support systems by deployment of IPDR standards.*
IPDR is an open standard for next generation communication management.