The Carrier Ethernet Muxponders use state-of-the-art carrier-grade Layer 2 (L2) switches and Nokia’s Service Router Operating System (SR OS) software to provide packet-optimized transport over wavelength division multiplexing (WDM) networks. These SR OS L2 packet muxponders deliver point-to-point transport and multipoint L2 switching and networking over the optical transport network (OTN) with differentiated MEF CE 2.0-certified Carrier Ethernet services.