Features: 1.Support IEEE802.3U.100BASE?T and 100 Base?FL protocols, support all?in?two?time or half?duplex network communication, with automatic negotiation capabilities 2.Modular design, plug?and?play, can be used alone, can also be used in 14 slot racks, automatically adapt to 10Mbps, 100Mbps, and 1000Mbps environments, RJ45 port supports direct or automatic identification 3.Remote PAUSE function guarantees the integrity of packet transfer, in line with electromagnetic interference standard for FCC Part15 Class A and for CE Mark Memsence 4.Fiber Optic Transceiver has the functions of features with broadcast protection, isolation conflict, and detection errors 5.Support for switch products for IEEE802.1Q protocol, support LINK LOSS link remote pre?alarm function specification:Item Type: Fiber Transceiver Model: TBC-MC3612ES20A Standard Agreement: IEEE 802.3IEEE 802.3uIEEE 802.3dIEEE 802.3x ,IEEE 802.3Q Bandwidth: Electrical Port: 10/100/1000M Optical Port: 1.25G Working Method: Full-Duplex / Half-Duplex, Full-Duplex / Semi-Duplex Automatic Negotiation Function Interface: Electrical Port: RJ45 Optical Port: For SC/FC/ST LED Indicator: Approx. 1000m / 109in100MFX/ACTTP/ACTPWRFDX UTP Network Cable: Cat5 UTP (Within Approx. 100m / 109yd) Optical Fiber Type: 9/125 (Up to 20-120km), 50/125, 62. 5 / 125m (Up to 2km) Power: 5W PackageList: 1 x Fiber Transceiver 1 x Plug 1 x User Manual NotePlease allow 0?2 cm error due to manual measurement. Thanks for your understanding