Case Studies

2 www.radisys.com RADISYS CUSTOMER STORY | Radisys Integrated Conferencing Solution Improves In addition, the solution lacked the ability to leverage economical VoIP technologies and network interconnection, while limiting the flexibility to integrate with other IP-based communication and back office systems. Clearly, a more cost-effective solution was needed to sustain rapid business growth in the face of the inevitable downward price pressures stemming from increased competition. "As the adoption of conferencing services in Asia is still very much in its infancy, we see immense opportunity in being an early innovator in hosted collaboration services. The Radisys solution enables us to deliver economical, integrated and feature-rich conferencing service offerings to our business customers." — CEO Conferencing and Collaboration Service Provider in China The selection and deployment of a Radisys Integrated Conferencing Solution, consisting of the SIPware conferencing platform with Radisys media servers, allowed the Chinese CSP to offer high-value differentiated conferencing services, while reducing operating expenses using a low cost, flexible VoIP architecture. In addition, the Radisys SIPware software eases integration of the CSP's web conferencing services, smartphone applications and back-end business systems. A More Competitve Conferencing Solution The Chinese CSP sought a solution capable of delivering the cost benefits of IP-based long distance communication, while enabling high-quality audio, advanced control and usability features. Radisys satisfied these requirements with an offering that excelled in a number of areas, including economics, flexibility and differentiation opportunities. Economics: Lowering Operating Costs The Radisys conferencing solution leverages the cost- efficiencies of IP-based, overseas networks and implements least-cost routing algorithms to determine the lowest cost interconnection between nodes. SIPware uses a signaling control protocol, called the Session Initiation Protocol (SIP), that can establish, modify and terminate multimedia sessions or calls communicated over Internet Protocol (IP). This capability allows SIPware to take full advantage of cost-efficient SIP trunking with carrier networks, supporting significant ongoing interconnection cost reductions compared to traditional circuit-based TDM trunks typically used in older audio bridge products. The solution also reduces IP backhaul traffic by mixing regional participants together and sending a single signal over long distances (transoceanic) instead of transmitting an individual media stream for each participant. Through cascaded conferencing, the platform implements economical global conferencing for a single call comprising thousands of participants. Figure 1 illustrates how this is accomplished using cascaded Radisys media servers. In this example, a regional media server in Beijing mixes together conference participants calling in from Shanghai, Nanjing and Tianjin, and the single aggregated mix is backhauled to the regional media server in San Francisco. Similarly, the media server in San Francisco mixes participants calling from cities in California with the aggregated overseas mix. In summary, only a single bi-directional VoIP packet stream is transmitted overseas instead of one stream per participant, thus significantly cutting overseas network bandwidth and costs. Cascading is not an option with TDM conferencing equipment because all participants must be backhauled to the same TDM audio bridge for conference mixing. Nanjing • • Los Angeles • San Diego Tianjin • Shanghai • Beijing ★ (regional media server) (regional media server) ★ San Francisco Figure 1. Backhaul traffic is reduced using cascaded Radisys media servers.

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