What type of optical fiber should be used for pre-installed fiber optic cables in the room

For pre-installed fiber optic cables in a room, OM4 multimode fiber with LSZH jacket is generally recommended for short-distance indoor networking.Fiber TypeFor indoor room installations, multimode fiber (MMF) is typically preferred because it supports high-speed data transmission over short distances, such as within a building or a single floor . OM4 multimode fiber is widely used today, offering high bandwidth and compatibility with 10G, 40G, and 100G Ethernet over distances up to 150 meters . Single-mode fiber (SMF) is usually reserved for long-distance or backbone connections, as it is optimized for distances over 10 km .Fiber Count and ConfigurationDuplex cables (two fibers: one for transmit, one for receive) are standard for full-duplex communication and are ideal for most indoor networking applications .Simplex cables (single fiber) are used for bidirectional transceivers or one-way links, but are less common for general room installations.Jacket TypeIndoor installations require a jacket that meets fire safety standards:LSZH (Low Smoke Zero Halogen): Emits minimal smoke and no halogen gases, making it safe for offices, classrooms, and other enclosed spaces .OFNR (Riser-rated): Suitable for vertical shafts between floors but not recommended for air-handling spaces.OFNP (Plenum-rated): Required if the cable runs through air-handling spaces like ceilings or ducts . For a typical room installation, LSZH jackets are preferred due to safety and compliance with building codes.ConnectorsCommon connectors for indoor fiber include LC or SC connectors, which are compact and compatible with most network devices and patch panels . LC connectors are especially popular for high-density applications.Summary RecommendationFor pre-installed fiber optic cables in a room:Fiber type: OM4 multimode fiberConfiguration: DuplexJacket: LSZH for safety in enclosed spacesConnectors: LC or SC, depending on equipment compatibility This setup ensures high-speed performance, safety, and future-proofing for indoor networking applications .