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Fiber optic transceivers have different classifications, but the actual use in most attention is classified according to different categories of optical fiber connector: SC joint optical transceiver and joint ST optical fiber transceiver, LC joint optical transceiver. In the use of fiber optic transceivers connect different devices, must pay attention to the use of different ports.

1, optical fiber transceiver to a 100BASE-TX device (switch, hub) connection:
Confirm the twisted pair cable length of not more than 100 meters;
Connect the twisted end to the optical fiber transceiver RJ-45 port (Uplink port), the other end to the 100BASE-TX (switches, hubs) RJ-45 (common mouth).

2, optical fiber transceiver to a 100BASE-TX device (NIC) connection:
Confirm the twisted pair cable length of not more than 100 meters;
Connect the twisted end to the optical fiber transceiver RJ-45 port (100BASE-TX port), the other end to the LAN port RJ-45.

3, the connection to the 100BASE-FX optical fiber transceiver:
Confirm the fiber length does not exceed the equipment can provide distance range;
SC/ST joint and one end of the optical fiber. Fiber optic transceivers, the other end is connected with 100BASE-FX equipment SC/ST joint.

Also need to add is that many users in the use of fiber optic transceivers: as long as the maximum distance of the fiber length can support in a single mode fiber or multimode fiber can be normal use. In fact, this is a wrong understanding, this understanding is only in the connecting device is full duplex device is right, when there is a half duplex device, the transmission distance of optical fiber has certain limitations.