Which boss has used China Telecom's Tianyi 3G wireless Internet access in Changchun High-tech Zone (coffee town, Feiyue Classic area)?

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The reasons for this situation Many:

1: First, carefully check the network cable and crystal (R45) head: Are the crystal head and socket plugged in properly (are they loose)? Is the contact good? What is the contact resistance? Is there any dust accumulation? Is it oxidized? Has the mechanical locking of the crystal head and base been locked? Is the latching secure? Are the network cable and crystal head tightly pressed and in good contact? The line-to-line insulation resistance of the network cable (using a 100V megger) should be greater than 20 megohms.

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2: Click on the computer, Open the device manager again, find the network adapter, click Disable, then start it again, it may be fine.

If it doesn’t work, don’t be angry! There is no such thing as a cow that suffocates to death, only a stupid man;……………………………….

3: If it still doesn’t work: take a look at the following methods, and you might as well adopt measures that you feel are acceptable. Method, thoroughly organize your phone, and you will not have this kind of phenomenon happen.

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A: People who often surf the Internet For up to half a year, users should open the shell of the device after powering off (by the way, check whether the internal connections of the device are good, whether the memory module is loose, and whether the memory module is in good contact with the card slot? Are the plug-ins loose? Are they plugged in tightly? Are the connection points firm? and good contact), clean the dust inside the equipment.

B: Due to overvoltage, low voltage, excessive voltage fluctuation, overcurrent, and heat generation of the equipment, the overheating protection action cuts out the fault and the equipment is taken out of operation (that is, slow, delayed, and repeated starts will occur) , delay, disconnection, interruption, disconnection, automatic shutdown, crash, etc.;

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1: Signal-to-noise ratio: (ratio of signal to noise) is small, the useful signal is obscured by noisy spurious signals (especially between symbols) (Inter-symbol interference), so that the receiving path cannot correctly extract useful signals from noisy signals, and the judgment circuit cannot correctly judge the code elements, resulting in packet loss. Severe packet loss is the cause of delay. , serious delay will be disconnection (which will produce slow, delayed, repeated startup, disconnection, delay, disconnection, interruption, disconnection, automatic shutdown, crash, etc.), use a noise meter or level meter to measure Is the noise level within the allowable range, or is there any spurious signal observed with an oscilloscope? Is there inter-symbol interference between codes? Take measures to eliminate it.

You can also take the following measures to deal with it, and do a good job of grounding and shielding the equipment. A lot of interference comes from poor shielding and poor grounding, causing computer slowness, packet loss, repeated startups, delays, and disconnections. , interruption, disconnection, automatic shutdown, crash and other display images.

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Two: Reception level : The received signal cannot be too low. If it is too low, it will not reach the threshold level amplitude required by the receiving circuit, and the device will not work properly; if the level is too high, the receiving circuit's pre-circuit will be saturated or burn out. Therefore, reception level adjustment is very important. Use a level meter or oscilloscope to adjust the reception level at the connection within the appropriate amplitude range.

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Three: Impedance matching: The connection points must have relatively matched impedances. Mismatching of input and output impedances will lead to reflection loss, and the signal will not work properly no matter how strong it is.

1: Place the device in a place that is safe for people. First disconnect the power, then open the cover of the device, and use air convection to enhance contact with the air for natural heat dissipation;

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2: Install a micro fan on the device to increase the air volume Convection for forced heat dissipation;

3: If you are in IT, I suggest you: After disconnecting the power supply, install heat sinks on the heating components of the equipment.

4: After the device is disconnected from the power supply, use a 3mm drill bit to drill multiple holes up and down the device to enhance air convection and improve heat dissipation conditions;

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5: Place the equipment in a ventilated and dry place, it is best to make a (also useful on the market) (for notebooks) insulating heat dissipation bracket, which supports the device for natural heat dissipation;

6: After the computer has been used for a long time, when the silica gel between the CPU and the heat sink dries up, the CPU will become seriously hot. Packet loss, delay, slowness, repeated startup, dropped calls, interruptions, disconnections, automatic shutdown, and crashes will occur. Reapply silicone and resume normal use.

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C: Clear the Internet in time Generated garbage fragments and IE cache: As long as you use the computer, garbage will be generated. If you don't clean it up in time, it will accumulate more and more. If you don't clean it for a long time, the running C drive space will become smaller and smaller, and it will be messy. Finally, it will gradually Slow down until it freezes; therefore, regular cleaning and running of the C drive can keep the computer running speed.

D: Let the ADSL device synchronize first: power off the device and then restart it.

E: The software settings should be reasonable and do not install 3: non-regular software, P2P (resource-consuming) software, and uncommon software. Turn off all unnecessary network connections. For example, Thunder BT Donkey, etc.;

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F: Optimize the network: When people turn on the computer and surf the Internet, they will generate garbage. Just like eating, not clearing the table, washing the tableware, and cleaning the stove will also generate computer garbage. The computer will gradually show symptoms of slowness, lag, delay, repeated startup, and crash. Line and other faults; therefore, I personally recommend using some small tools: such as Super Rabbit, Optimization Master, Master Lu or 360, etc.; develop a good habit of cleaning up garbage before going offline.

G: At least one effective and genuine anti-virus software: Appropriate firewall settings (not too many or too high); viruses can cause the computer to slow down, crash, disconnect, freeze, restart repeatedly, and cause power on and off failures. .

H: Network card problem: The network card has appropriate bandwidth, works stably and has good heat dissipation.

Be well grounded, route strong and weak signals separately, and route high and low frequency signals separately; shield and ground well; when surfing the Internet, try to avoid Internet peak hours.

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As long as you follow it carefully If you do the above and keep doing it regularly, your equipment will work smoothly and your mood will be comfortable. Even a computer with low configuration can make you very satisfied; otherwise: no matter how high-configuration the computer is, it will still fail frequently. It breaks down; just like when people wear clothes (skit: Chen Peisi in Good Guys and Bad Guys: No matter how good you give him clothes, he can't go up the grade!), the clothes don't have to be high or low, they just need to be clean and neat. No matter how high your configuration is, if you don't follow computer safety maintenance and usage methods, you will have constant failures and frequent accidents. Many failures are man-made, everything depends on man-made things!

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