Port 201 on the optical splitter should be connected to the corresponding OLT port that serves that segment of the PON network, typically an upstream PON port on the OLT.

Understanding Splitter Ports

Optical splitters have input ports and output ports. The input port receives the optical signal from the OLT, while the output ports distribute the signal to multiple ONTs (end-user devices) in a PON network . In a typical 1:n splitter, there is one input port and multiple output ports, and the signal is split equally or according to a specified ratio .

Connecting Port 201

• Upstream Connection: Port 201 on the splitter is usually an output port that connects to a specific ONT or a distribution fiber leading to multiple ONTs. The input port of the splitter should be connected to the OLT PON port that corresponds to the service area for port 201 .
• Downstream Direction: The OLT sends data downstream to the splitter input, which then distributes it to port 201 and other output ports. In the upstream direction, signals from port 201 travel back to the OLT through the same splitter input .
• Labeling and Mapping: Ensure that port 201 is mapped correctly in the network documentation so that the OLT recognizes the ONT or subscriber connected to that port. This avoids misrouting and ensures proper bandwidth allocation .

Best Practices

1. Verify Splitter Type: Confirm whether the splitter is 1:n or cascaded (e.g., 1×4 feeding a 1×8 stage) to understand which output port corresponds to port 201 .
2. Use Proper Connectors: Ensure the fiber connectors match the OLT and ONT ports (e.g., SC-PC or UPC) to minimize insertion loss .
3. Test Signal Strength: After connecting, use an optical power meter to verify that port 201 receives the correct signal level and that the splitter is functioning properly .
4. Document Connections: Maintain a clear record of which OLT port connects to which splitter input and which output serves each subscriber, including port 201 . By following these guidelines, port 201 should be connected to the splitter output that corresponds to the intended ONT or subscriber, with the splitter input linked to the appropriate OLT PON port to ensure proper network operation.