IPv6 VoIP Deployment on Taiwan Academic Network (TANet)

We deploy a large-scale trial for Voice over IP (VoIP) by using Internet Protocol version 6 (IPv6) on Taiwan Academic Network (referred to as TANet). To reduce the overhead of the inter-connection among the schools using TANet, the computer center of Ministry of Education (MoE) establishes a VoIP exchange center referred to as TANet VoIP Platform and assign National Ilan University (NIU) to operate this platform. In this paper, we introduce the architecture of TANet VoIP Platform and the numbering plan. We introduce two solutions to solve the problem that a new deployed IPv6 phone cannot communicate with an IPv4 phone. Specifically, we present the modifications of the IPv6 phones and SIP servers, and show three message flow examples that cover all VoIP call scenarios in TANet VoIP Platform.