Low Cost Implementation of Multiple Services in a Telephone Plant Hosted in a Cloud Infrastructure

This paper present the implementation of an OpenSource telephone plant called Issabel, a Linux based PBX (private telephone network), totally hosted in a cloud infrastructure, with the aim of taking advantage of all its features and functionalities such as email server, chat server, call center, etc. Allowing agents to connect from anywhere in the world and allowing cost reduction compared to traditional implementations, importance is given to the cybersecurity aspects involved in the internet. The connection with the public switched telephone network is investigated and implemented. Finally, it is made a cost comparison between implementing cloud services and how it was done traditionally.