What device is the optical splitter connected to

An optical splitter is connected upstream to an Optical Line Terminal (OLT) and downstream to multiple Optical Network Terminals (ONTs) or end-user devices.Upstream ConnectionThe input side of the optical splitter receives the optical signal from the OLT, which is the central device in a passive optical network (PON) responsible for sending data, voice, and video signals to multiple subscribers . The OLT is typically located at the service provider's central office or distribution hub. The splitter allows a single fiber from the OLT to serve multiple users, efficiently distributing the signal without requiring additional fibers for each subscriber .Downstream ConnectionThe output ports of the splitter connect to multiple ONTs or subscriber devices at homes or businesses. Each output fiber carries a portion of the original optical signal to an individual ONT, which converts the optical signal into electrical signals for end-user devices like computers, phones, or TVs . Depending on the network design, splitters can have ratios such as 1:4, 1:16, 1:32, or 1:64, allowing one OLT port to serve multiple ONTs .Network PlacementOptical splitters are usually installed in fiber distribution boxes, optical distribution frames (ODFs), or outdoor enclosures. They can be centrally located near the OLT for urban deployments or cascaded in multiple stages to reach dispersed users in rural areas . The splitter operates passively, requiring no power, and can handle bidirectional signals for two-way communication .SummaryIn essence, the optical splitter acts as a bridge between the OLT and multiple ONTs, enabling a single optical fiber to serve many subscribers efficiently. The upstream connection is always to the OLT, and the downstream connections are to the ONTs or end-user devices, making it a critical component in passive optical networks .