Voice over LTE (VoLTE)

IP multimedia subsystem (IMS) is becoming the preferred technology to support high-quality voice services and other applications in long-term evolution (LTE) networks. By deploying Tekelec’s solution, you can overcome the key challenges involved in implementing voice over LTE (VoLTE) services and:

• Scale and secure your IMS network, including SIP and Diameter interfaces, to support rapid migration from existing circuit-switched voice services
• Ensure voice quality of service (QoS) between the IMS network and the mobile device
• Provide seamless services when roaming, call forwarding, sending traditional short message service (SMS) messages, or using devices with multiple access modes
• Create security at the application level with call admission and roaming policies
• Evolve message service to all-IP networks
• Measure and gain visibility of VoLTE services compared with circuit-switched voice services

Service providers are delivering advanced VoLTE services, using Tekelec’s mobile broadband solutions portfolio, which includes:

• Diameter Signaling Routing (DSR) to ensure service scalability and security when connecting roaming partners
• Subscriber Data Management (SDM) to manage subscriber data across multiple domains. This is required for seamless call termination across different access networks and continuity of services such as call forwarding to other access networks
• Policy Server (PCRF) to guarantee quality of service and charging controls for real-time Voice over IP services over the LTE network
• Mobile Messaging products to ensure SMS service continuity and messaging services over IMS
• Performance Intelligence Center (PIC) to analyze and improve voice services across multiple access networks