The MicroOLT (shown in Figure 11.7) is a PON optics module with an embedded Ethernet bridge with PON MAC and physical (PHY) layers in the enhanced small form-factor (SFP +) form factor (one of the enhanced versions of the small form-factor pluggable transceiver specification.) The MicroOLT is a component building block of a vOLT platform. It uses 10 Gbps XGS-PON optics to enable XGS-PON protocols and speeds at a fraction of the cost of using tunable dense wavelength division multiplexing (DWDM) optics. This 10 Gb/s OLT plugs into low-cost white-box Ethernet switches or other Ethernet-enabled networking equipment with SFP+ sockets, instantaneously enabling them to become the network access node for a 10 Gb/s PON network. This SFP+ OLT design facilitates SDN and NFV in the new architecture, enabling it to become the hardware component of a vOLT. Figure 11.8 shows a high-level design of a MicroOLT used in the new access architecture. The functionality of the OLT can be split into multiple parts to align with the generic network functions and isolate the functions specific to PON access technology. The MicroOLT contains the PON-specific functions including bridging, MAC Layer, and physical layer optics. The rest of the system can be generic functions of layer 2 switching for aggregation and layer 3 switching with traf- fic management and routing. These generic devices can be based on standalone data center switch- ing components with SDN control and cloud orchestration. Significant flexibility can be achieved by selecting PON or point-to-point Ethernet for each port on an Ethernet switch, on a port-by-port basis as needed. The MicroOLT eliminates the need to deploy a dedicated chassis, while using less power and requiring less space. Cost savings and added flexibility are achieved by removing the application-specific hardware and replacing it with best-in- class Ethernet switches. 16 Port OLT Pizza Box-The Open XGS-PON 1RU vOLT is a cost-optimized access design focused on NFV Infrastructure deployments, which support