platform. The management includes four fundamental aspects: location, accounting, security, and monitoring. The location scheme is based on DNS, ENUM, LDAP, and H.350 proto- cols. The security includes the authorization and authentication performed by © 2009 by Taylor & Francis Group, LLC SIP: Advanced Media Integration SIP media platform Application Media server server server server server Internet Campus network Internet2 Analog phone Analog phone + analog telephone adapter IP phone (SIP-based) Softphone FIGURE 2.15 SIPcat scenario. RADIUS. The monitoring is performed by automatic SNMP-based scripting and service control implemented using Nagios. The accounting is a proprietary design oriented to provide the information of resource utilization. In SIPcat (see Figure 2.15), the dialing scheme was designed according to Internet2 testbed platforms: Videnet and SIP.edu. The H.323 dialing plan is compatible with the Global Dialing Scheme (GDS) and the SIP-URI compatible with the e-mail contact addresses. The GDS is a new numbering plan for the global video and voice over IP network testbed, developed by ViDeNet [29]. This infrastructure is based on the above-mentioned Internet2 SIP.edu [30] experience. It promotes the convergence of voice and e-mail identities, increas- ing SIP-reachability, and builds community schools that are developing and deploying campus SIP services in the Internet2 community. Another similar experience is the Global University Phone System (GUPS) [31], using mainly Asterisk. The service delivery is supported by providing different service platforms such as Web services, SIP Servlets [13], and Call Processing Language (CPL) [32]. The main element of the application and media control is the Application Server implemented through a SIP Servlets Framework. A framework has been designed for SIP-based services development. The design of the framework is based on a three-tier architectonic model. First of all, the core component is a SIP Application Server implemented by a SIP stack based in Jain S