REDWOOD CITY, Calif. -- CoSine Communications Inc. (Nasdaq: COSN - News), a leading provider of managed, network-based IP Service Delivery Platforms for service providers, today announced that KT Corporation (formerly Korea Telecom), South Korea's leading broadband and IP service provider with over 110 years experience in the communications industry, has placed additional orders for CoSine's IPSX 9500(TM) with the advanced IPSG(TM) technology. KT is using the additional IPSX 9500 units to provide a single platform solution for the company's next-generation IP-VPN service offering. This new IP VPN service will enable business subscribers to receive two services -- secure Internet and intranet services -- from a single connection. "We originally purchased the IPSX 9500 as a services gateway because of its stability, high-performance and ability to support many different services, as well as scale to thousands of users," stated Mr. C. K. Choe, KT's Business Team Manager. "When we needed a new IP VPN edge solution in our network, we again chose the IPSX 9500 because CoSine is the only vendor to offer MPLS VPNs, IPSec VPNs and Secure firewall in a single integrated platform. After evaluating multi-box solutions from various IP service router vendors, CoSine emerged as the only platform to pass our rigorous benchmark testing criteria."CoSine's IPSX 9500 enables KT to deliver IP VPN and managed firewall service irrespective of the individual customer's access technology. KT will use CoSine's InVision(TM) Services Management System to quickly and cost-effectively provision access to its backbone at full line rate speeds while supporting thousands of virtual routers and encrypted VPN connections.KT's integrated service offering based on CoSine's IPSX 9500 will be available in early Q2 2003 and rolled out initially to nine metropolitan points of presence (POPs) within its services footprint. CoSine Communications Inc.