IP Telephony/VoIP
Keller School of Management - Devry University
NETW590
Professor Reddy Urimindi
Table of Contents
Executive Summary 3
Introduction 3
Evolution of IP Telephony – Mobile/Physical Applications 4
Hardware Capabilities 5
Intrusion/Denial of Service (DoS) 5
Analyses 6
Hardware/Customer Purchased Equipment (CPE) Analysis 6
Intrusion/Denial-of-Service (DoS) Analysis 9
Recommended Solution and Implementation 11
Hardware/Intrusion/DoS Resolution Steps: 11
Cost of Implementation 13
Risk Assessment 13
References 16
Executive Summary
Introduction
In the evolving trend of telephony technology, the time of circuit-switched packet-switched telephone network (PSTN) is now the backbone for Voice over Internet Protocol (VoIP). Service providers are in the midst of a gradual evolution from circuit-switched to IP-based packet-switched infrastructures. IP is attractive for two main reasons: cost savings and revenue. Carriers expect operational and infrastructure savings from deploying new IP-based services because they believe that implementing applications on IP networks will be much less expensive than running them on circuit-switched networks. In addition, every carrier is looking for new ways to enhance its service suites, which are rapidly becoming commodities. The evolution to IP-based infrastructures means more shared networks. Because IP emphasizes logical over physical connections, IP makes it easier for multiple carriers to coexist on a single network. This encourages cooperative sharing of interconnected networks, structured as anything from sales of wholesale circuits to real-time capacity exchanges. It also means increased competition because there are reduced barriers to entry; new companies can enter the market without the huge fixed costs associated with traditional network models.