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Traffic growth across core networks has proven to be a major driver for IP-optical integration. As time-division multiplexing (TDM)-based framing at Layer 2 has been discarded in favor of simpler architectures, there has been an increasing need for a technology to replace the performance monitoring and fault-handling characteristics of SONET. Thus, the Optical Transport Network (OTN) with G.709 framing has emerged as a way to add management capabilities to wavelengths. Juniper Networks has incorporated this technology into 10-Gigabit Ethernet interfaces to provide IP over Dense Wavelength-Division Multiplexing DWDM (IPoDWDM). Integrating OTN technology into routers enables the evolutionary next step in a carrier's infrastucture while providing optimal utilization of transport capacity.
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