Overcome the limitations of legacy network technologies in your access network (PDH, SONET, SDH) and evolve beyond a circuit-switched transport networks to a future-proof packet-based network with the Cisco ASR 900 Series. The ASR 900 Series addresses legacy network inefficiencies by delivering a cost-effective, modular solution based on a protocol-independent fabric architecture. The ASR 900 Series, delivers unbounded scale with Circuit Emulation (CEM) and Optical Transport Network (OTN) capabilities, in addition to supporting Carrier Ethernet business services, over a redundant and protected packet-based network (Multiprotocol Label Switching [MPLS]/FlexLSP).