The Carrier Ethernet Switch Cards for the Nokia 1830 Photonic Service Switch (PSS) use state-of-the-art carrier-grade Layer 2 (L2) switches and the Nokia Service Router Operating System (SR OS) software to provide packet-optimized transport over wavelength division multiplexing (WDM) networks. These Carrier Ethernet Switch Cards are complementary to the Carrier Ethernet Muxponders, delivering the full set of Carrier Ethernet services in point-to-point and multipoint configurations with Layer 2 switching and networking over optical transport networks (OTN) with higher interface rates and higher Layer 2 switching capacities.