VOIP INSTALLATIONWelcome to the implementation of Voice over IP or VOIP. This document will explain the advantages and disadvantages of using VOIP. Quality of Service or QoS will be discussed. Security problems and solutions for IP telephone systems and networks. The basics and many protocols will be discussed. Voice clarity considerations will be discussed. 911 Business Requirements for VOIP Phone Systems. End-to-end VPNs versus firewall-based VPNs.VOIP what are the advantages of having this system. Cost savings, cost reduction, phone portability, service mobility and integration with other applications. The cost savings are extremely less than the old Private Branch Exchange (PBX). There are no charges for long distance calls and online directories. The company saves money on equipment, lines and labor. Local service providers provide an assortment of services. The VOIP system supports email, instant messaging, video conferencing and sending images. VOIP will run normal systems like telephone and fax. Today's world is full of moving technology. Phones can go anywhere as long as they have an IP connection. IP phones have the same numbers and go everywhere in the world. The service is available almost everywhere for IP phones. This makes the office mobile. Calling capabilities and voicemail access to security features and service policies. VOIP is part of a larger trend towards converged communications. Email systems along with web browsers are what the new generations live by. The social networking crowd loves systems. VOIP makes all this possible. Data networks are becoming increasingly reliable and high-speed networks. The disadvantages of the VOIP system...... middle of paper ......the ability to use firewalls to analyze VOIP traffic for malicious or suspicious patterns would be lost. The right hardware and software to address enterprise VOIP security challenges will keep your system secure. The final upgrade will make your system more efficient and less expensive than your old PBX. Be sure to plan your upgrade. It will take a lot of updates to get what you need or what you think might work. Technology changes every day. Research is the best solution to keep the best products and protocols up to date. References Kuhn, D., Wash, T., & Fries, S. (2005). NIST Special Publication 800-58 Lazzez, A. (2013, December 2008). VoIP Technology Deployment: QOS Concerns. Retrieved from http://www.arxiv.org/abs/132.2581 Carter, S. (2012). E911 VoIP essentials for enterprise deployments. Retrieved from http://www.xo.com