What do the fiber optic transceivers TX and RX mean, and what is the difference?

Optical fiber transceiver is an Ethernet transmission media conversion unit that exchanges short-distance twisted pair electrical signals and long-distance optical signals. It is also called a fiber converter in many places. The product is generally used in the actual network environment where the Ethernet cable cannot cover and must use optical fiber to extend the transmission distance, and is usually positioned at the access layer application of the broadband metropolitan area network.For example: high-definition video image transmission for surveillance security engineering; It has also played a huge role in helping to connect the last mile of fiber to the metropolitan area network and beyond.

First, Optical fiber transceivers TX and RX

When using fiber optic transceivers to connect different devices, you must pay attention to the different ports used.

1. Connection of optical fiber transceiver to 100BASE-TX equipment (switch, hub):

Confirm that the length of the twisted pair is no more than 100 meters;

Connect one end of the twisted pair to the RJ-45 port (Uplink port) of the fiber optic transceiver, and the other end to the RJ-45 port (common port) of the 100BASE-TX device (switch, hub).

2. Connection of optical fiber transceiver to 100BASE-TX equipment (network card):

Confirm that the length of the twisted pair is no more than 100 meters;

Connect one end of the twisted pair to the RJ-45 port (100BASE-TX port) of the fiber optic transceiver, and the other end to the RJ-45 port of the network card.

3. Connection of optical fiber transceiver to 100BASE-FX:

Confirm that the fiber length does not exceed the distance range provided by the device;

One end of the optical fiber is connected to the SC/ST connector of the optical fiber transceiver, and the other end is connected to the SC/ST connector of the 100BASE-FX device.

Second, the difference between fiber optic transceivers TX and RX.

TX is sending, RX is receiving. The optical fibers are in pairs, and the transceiver is a pair. Sending and receiving must be at the same time, only receiving and not sending, and only sending and not receiving is problematic. If the connection is successful, all the power light signal lights of the fiber optic transceiver must be on before they can be turned on.