1Support IEEE802.3U.100BASET and 100 BaseFL protocols, support allintwotime or halfduplex network communication, with automatic negotiation capabilities 2Modular design, plugandplay, 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 3Remote PAUSE function guarantees the integrity of packet transfer, in line with electromagnetic interference standard for FCC Part15 Class A and for CE Mark Memsence 4Fiber Optic Transceiver has the functions of features with broadcast protection, isolation conflict, and detection errors 5Support for switch products for IEEE802.1Q protocol, support LINK LOSS link remote prealarm function 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 1 x Fiber Transceiver 1 x Plug 1 x User Manual Please allow 02 cm error due to manual measurement. Thanks for your understanding