What port does the optical splitter use
The input port of an optical splitter is connected to a PON port on the OLT in the central office, while the output ports connect to ONTs at customer premises.
Input Port Connection
In a typical FTTH (Fiber to the Home) or PON network, the input port of the optical splitter is directly connected via a single fiber to an OLT port in the central office or distribution hub. This connection allows the optical signal from the OLT to be divided among multiple output fibers, enabling service to multiple end users from a single OLT port .
Output Port Connections
The output ports of the splitter are connected to individual fibers that lead to customer premises, where they terminate at Optical Network Terminals (ONTs). For example, a 1×32 splitter will have one input fiber from the OLT and 32 output fibers, each serving a separate home or business . This configuration allows a single OLT port to serve multiple subscribers efficiently.
Splitter Architectures
- Centralized Splitters: Located near the OLT, centralized splitters allow flexible assignment of customers to output fibers and simplify testing and troubleshooting. The input port always connects to the OLT, and output fibers are routed to distribution panels or access terminals .
- Cascaded Splitters: In a cascaded setup, a first-stage splitter connects to the OLT, and its output fibers feed secondary splitters closer to the customer. Each stage splits the signal further, but the first-stage input port remains connected to the OLT .
Summary
The optical splitter's input port is always connected to the OLT port, while the output ports distribute the signal to ONTs at the subscriber end. This setup is fundamental to PON networks, enabling efficient sharing of a single OLT port among multiple users while maintaining signal quality and network scalability .
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