The advent of the Internet era requires higher bandwidth and transmission speed. Optical fiber is the best choice, with fast transmission, large bandwidth, stable signal, and long distance. It is an inevitable choice. Since optical transmission can only transmit optical signals and cannot transmit electrical signals, how to convert electrical signals into optical signals for transmission? How to convert the optical signals into electrical signals at the other end of the optical fiber? This problem needs to be solved. A fiber optic transceiver came into being to solve the problem of converting light to electricity and electricity to light, and at the same time evolved a more advanced product called an optical module. The principle is the same as that of a fiber optic transceiver, but the price is worlds apart.
What is a fiber optic transceiver
Optical fiber transceiver, also known as photoelectric converter, is an Ethernet transmission media conversion unit that exchanges short-distance twisted-pair electrical signals and long-distance optical signals. Different observation angles make people have different understandings of fiber optic transceivers, such as single 10M, 100M fiber optic transceivers, 10/100M adaptive fiber optic transceivers and 1000M fiber optic transceivers according to the transmission rate. To put it bluntly, it is to convert an electrical signal into an optical signal, transmit it to the other end through an optical fiber, and convert the optical signal back to an electrical signal, which is an optical fiber transceiver. Subdivided into single-mode and multi-mode fiber optic transceivers
A brief introduction to the installation of optical transceivers
1. First, check whether the indicator light of the optical fiber transceiver or optical module and the twisted pair port indicator light are on?
a. If the optical port (FX) indicator of the transceiver is not on, please confirm whether the optical fiber link is cross-linked? One end of the optical fiber jumper is connected in parallel; the other end is connected in cross-connection.
b. If the optical port (FX) indicator of the A transceiver is on, and the optical port (FX) indicator of the B transceiver is not on, the fault is on the A transceiver side: one possibility is: A transceiver (TX) optical transmission The port is broken, because the optical port (RX) of the B transceiver cannot receive the optical signal; another possibility is: the optical fiber link of the optical transmission port of the A transceiver (TX) has a problem (optical cable or optical jumper may be broken).
c. The twisted pair (TP) indicator light does not light up, please confirm whether the twisted pair cable is connected incorrectly or is connected incorrectly? Please use a continuity tester to test (but the twisted pair indicator light of some transceivers must wait for the optical fiber chain Lights only after the road is connected).
d. Some transceivers have two RJ45 ports: (To HUB) means that the connection line connected to the switch is a straight-through line; (To Node) means that the connection line connected to the switch is a crossover line.
e. There are MPR switches on the side of some transmitters: it means that the connection cable connected to the switch is a straight-through cable; DTE switch: the connection cable connected to the switch is a crossover cable.
2. Are the optical cables and optical fiber jumpers broken?
a. Optical cable on-off detection: Use a laser flashlight, sunlight, or illuminator to illuminate one end of the optical cable connector or coupler; see if there is visible light at the other end? If there is visible light, it means that the optical cable is not broken.
b. On-off detection of optical fiber connection: use laser flashlight, sunlight, etc. to illuminate one end of the optical fiber jumper; see if there is visible light at the other end? If there is visible light, it means that the optical fiber jumper is not broken.
3. Is the half/full duplex mode wrong?
Some transceivers have FDX switches on the side: full duplex; HDX switches: half duplex.
4. Detect with an optical power meter
The luminous power of optical fiber transceiver or optical module under normal conditions: multimode: between -10db--18db; single-mode 20km: between -8db--15db; single-mode 60km: between -5db--12db ; If the luminous power of the optical fiber transceiver is between: -30db--45db, then it can be judged that there is a problem with the transceiver