Circuit Emulation over IP Networks

Executive Summary Circuit emulation over IP networks is becoming increasingly important for service providers who want to offer new service opportunities to subscribers and cut operational costs on their existing offerings. However, there are both technical and administrative challenges to overcome before service providers can embrace circuit emulation. The primary technical challenges are clock synchronization and jitter management. On the administrative side, network operators need diagnostic tools that will allow them to work in both time-division multiplexing (TDM) and IP domains without extensive retraining. Juniper addresses these challenges with Adaptive Time Domain Processing ™ (ATDP), a key technology used in the Juniper Networks Circuit to Packet (CTP) Series. ATDP efficiently recreates the source clock based on timing information contained in the received packet stream, ensuring end-to-end synchronization. Configurable jitter buffers in the CTP Series allow network operators to match the requirements of individual circuits to manage variable network latencies. Finally, CTPView software provides an intuitive diagnostic monitor that allows network operators trained in TDM technology to work effectively in the circuit emulation domain in a relatively short time, often with no additional formal training.