Call routing management in enterprise VoIP networks

Abstract

Voice over IP (VoIP) usage is growing at an astronomical rate, resulting in large infrastructures that are becoming increasingly challenging to manage. In this paper, we focus on the management of call routing which determines how calls are routed inside a VoIP infrastructure, particularly for large multi-site infrastructures such as enterprise networks. Call routing can be complex because of several contributing factors. First, each site may independently manage and implement their own call routing policies. Second, a wide range of policies such as minimal cost or maximum performance may be in use. Existing call routing tools help with configuring or installing the policies but do not provide a means to understand or verify the policies that have been configured. In this paper, we present an analysis and visualization tool to manage call routing policies by providing a consolidated view that facilitates reasoning about the routing policies that are in use in the system. Copyright 2007 INM'07.