Sonus Networks, Inc. (Nasdaq: SONS), a global leader in secure and intelligent Cloud communications, today announced that Mark Greenquist has resigned as Chief Financial Officer of the Company, effective June 15, 2016, to take a similar role at a leading e-commerce platform company. Susan Villare, Vice President of Financial Planning and Analysis, will fulfill the duties as interim Chief Financial Officer while the Company considers both internal and external candidates.

Ray Dolan, President and Chief Executive Officer, said, "We appreciate Mark's contributions to Sonus over the past two and a half years, as we strengthened our culture of innovation and implemented our strategy for building a stronger business. We wish him well in his new role."

About Sonus Networks

Sonus brings intelligence and security to real-time communications. By helping the world embrace the next generation of cloud-based SIP and 4G/LTE solutions, Sonus enables and secures latency-sensitive, mission critical traffic for VoIP, video, instant messaging and online collaboration. With Sonus, enterprises can give priority to real-time communications based on smart business rules while service providers can offer reliable, comprehensive and secure on-demand network services to their customers. With solutions deployed in more than 100 countries and nearly two decades of experience, Sonus offers a complete portfolio of hardware-based and virtualized session border controllers (SBCs), diameter signaling controllers (DSCs), policy/routing servers, network intelligence applications, media and signaling gateways and network analytics tools. For more information, visit www.sonus.net or call 1-855-GO-SONUS.