TAKE ADVANTAGE OF THE BENEFITS OF ESI SIP TRUNKING SIP TRUNKING (using Session Initiation Protocol) converges your existing telephone infrastructure onto your data network, for high-quality voice communications. ESI SIP TRUNKING gives you the ability to combine voice and data, so you can reduce your monthly expenses by up to 50%, getting rid of legacy analog lines. Your company can experience the benefits of SIP, increasing business productivity and reducing communications costs. Add ESI SIP trunking to your ESI Communications Server and save. ADDITIONAL BENEFITS OF ESI SIP TRUNKING: • Unlimited local and longdistance calling. • On-demand audio conferencing. • Disaster recovery. • Flexibility and scalability.