Problems encountered in the installation and use of fiber optic transceivers and their solutions

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This
article will share with you the problems and solutions frequently encountered
during the installation and use of fiber optic transceivers. When encountering
these problems, how should we deal with them? Now Fiber-mart.com Communication
will share with you the installation and troubleshooting methods of the optical
fiber transceiver through this article:

 

Problems
encountered in the installation and use of optical fiber transceivers

Step
1: First check whether the indicator light of the fiber optic transceiver or
optical module and the twisted pair port indicator light are on?

 

1.
If the optical port (FX) indicator of the A transceiver is on and the optical
port (FX) indicator of the B transceiver is off, the fault is at the A
transceiver: one possibility is: A transceiver (TX) optical transmission The
port is broken, because the optical port (RX) of the B transceiver cannot
receive optical signals; another possibility is: there is a problem with the
optical fiber link of the optical transmitting port of the A transceiver (TX),
such as a broken fiber jumper .

 

2.
If the FX indicator of the transceiver is off, please make sure whether the
optical fiber link is cross-linked? One end of the fiber jumper is connected in
parallel; the other end is connected in cross mode.

 

3.
Twisted pair (TP) indicator light is not on. Please make sure whether the
twisted pair connection is wrong or wrong? Please use a continuity tester to
check (but the twisted pair indicator of some transceivers must wait for the
optical fiber link Lights up after the circuit is connected).

 

4.
Some transceivers have two RJ45 ports: (ToHUB) indicates that the cable
connecting the switch is a straight-through line; (ToNode) indicates that the
cable connecting the switch is a crossover cable.

 

5.
There is an MPR switch on the side of some transmitters: it means that the
connection line to the switch is a straight-through line; DTE switch: the
connection line to the switch is a crossover line.

 

Step
2: Analyze and determine whether there are problems with fiber jumpers and
cables?

 

1.
On-off detection of optical fiber connection: use a 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 indicates that the
optical fiber jumper is not broken.

 

2.
Optical cable on-off detection: use a laser flashlight, sunlight, or luminous
body 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.

 

Step
3: Is the half/full duplex mode wrong?

 

There
is an FDX switch on the side of some transceivers: it means full-duplex; HDX
switch: it means half-duplex.

 

Step
4: Use an optical power meter to detect

 

The
luminous power of the optical fiber transceiver or optical module under normal
conditions: multimode: between -10db and 18db; single mode 20 km: between -8db
and 15db; single mode 60 km: between -5db and 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.

Matters
needing attention in fiber optic transceivers

For
the sake of simplicity, it is better to use a question-and-answer format, which
can be clear at a glance.

 

1.
Does the optical transceiver itself support full duplex and half duplex?

 

Some
chips on the market can only use the full-duplex environment at present, and
cannot support half-duplex. If they are connected to other brands of switches
(SWITCH) or hubs (HUB), and it uses half-duplex mode, it will definitely cause
Serious conflicts and packet loss.

 

2.
Have you tested the connection with other fiber optic transceivers?

 

At
present, there are more and more optical fiber transceivers on the market. If
the compatibility of transceivers of different brands has not been tested
beforehand, it will also cause packet loss, long transmission time, and sudden
speed and slowness.

 

3.
Is there any safety device to prevent packet loss?

 

In
order to reduce costs, some manufacturers use Register data transmission mode
when manufacturing fiber optic transceivers. The biggest disadvantage of this
method is instability and packet loss during transmission. The best is to use
buffer circuit design, which can be safe. Avoid data loss.

 

4.
Temperature adaptability?

 

The
fiber optic transceiver itself will generate high heat when it is used. When
the temperature is too high (not greater than 50°C), whether the fiber optic
transceiver is working properly is a factor worthy of customers’ consideration!

 

5.
Does it comply with the IEEE802.3u standard?

 

If
the fiber optic transceiver meets the IEEE802.3 standard, that is, the
delaytime is controlled at 46bit, if it exceeds 46bit, it means that the
transmission distance of the fiber optic transceiver will be shortened!!!

 

6.
After-sales service:

 

In
order to enable the after-sales service to respond promptly and early, it is
recommended that customers purchase optical fiber transceivers according to the
manufacturer’s strong strength, technology, reputation and other companies. For
example: ETULINK (etulink.com) is a high-tech company focusing on the
development, application and promotion of new technologies and new products.
With a good reputation, stable product quality and professional technical
service capabilities, the company has become the preferred supplier of
switching equipment, routing equipment and other network products at home and
abroad.