Sonus Networks, operating in the United States (North America & Caribbean), utilizes the Mobile Country Code (MCC) 311 and Mobile Network Code (MNC) 820. While not a traditional mobile network operator providing direct consumer cellular services like Verizon (MCC 310), AT&T (MCC 310), or T-Mobile (MCC 310), Sonus Networks focuses on providing critical infrastructure and solutions for other telecommunications providers. Think of them as the behind-the-scenes experts enabling reliable voice and data communication across various networks. Their technology plays a key role in VoIP (Voice over Internet Protocol), ensuring seamless call quality and network performance for businesses and service providers alike. Although Sonus Networks doesn't offer SIM cards or mobile data plans directly to consumers in the United States, their impact on the mobile landscape is significant, particularly in the evolution of modern communication systems. They are involved in delivering solutions relating to secure communications, cloud based infrastructure and also next generation signaling, as they work within the North America and Caribbean region with carrier and enterprise clients who leverage their services. They may connect with similar companies to other technology providers and network infrastructure businesses.