What fiber optic cable is used for the OLT in the data center

An OLT connects to fiber optic cables via PON ports, using optical splitters to distribute signals to multiple ONUs/ONTs, converting electrical signals to optical signals for transmission.Connection OverviewThe Optical Line Terminal (OLT) is installed in the data center or central office and serves as the master device in a Passive Optical Network (PON). It interfaces with the core network through high-speed Ethernet or GPON/EPON uplinks and converts electrical signals from the network into optical signals suitable for fiber transmission .Fiber Interface and SplittersThe OLT connects to the Optical Distribution Network (ODN) using PON ports, which are typically equipped with SC or LC fiber connectors . From each PON port, a single optical fiber runs to a passive optical splitter, which divides the signal to serve multiple endpoints, such as 32, 64, or 128 Optical Network Units (ONUs) or Optical Network Terminals (ONTs), . This point-to-multipoint topology allows one OLT port to serve many users efficiently.Signal TransmissionThe OLT uses Wavelength Division Multiplexing (WDM) to transmit downstream and upstream data over the same fiber. Downstream data is broadcast to all connected ONUs/ONTs, while upstream data is sent in bursts using Time Division Multiple Access (TDMA) to avoid collisions . The OLT manages bandwidth allocation, traffic prioritization, and signal conversion, ensuring reliable communication across the network.Physical SetupInside the data center, the OLT chassis contains multiple modules, including PON cards, control boards, and redundant power supplies. Fiber patch cables connect the OLT PON ports to the optical splitters, which are then linked to distribution fibers and drop fibers leading to end-user ONTs . In some cases, attenuators are used to adjust optical signal strength when the fiber distance is short to prevent signal overload .SummaryIn essence, the OLT connects to fiber optic cables by converting electrical signals to optical signals, sending them through PON ports to optical splitters, and distributing them over the fiber network to multiple ONUs/ONTs. This setup enables efficient, scalable, and high-speed data delivery in GPON or EPON-based data center networks .