What is going on when the router is down? How can this problem be solved?

 

You may encounter: slow access to the Internet (you cannot browse the Web page, access to the card, access to the network, poor signal, signal delay, connection failure, instability, packet loss, high error rate, connection failure, disconnection, shutdown, and no reason for interruption...) And other phenomena;

 

The computer runs stably and must meet the following conditions:

 

I. Prerequisites:

 

 

A: stable power supply voltage (Auxiliary UPS power supply is installed when necessary), valid power cord section; compliant with safety insulation level.

 

 

 

B: suitable dry and ventilated temperature (if necessary, a fan or air conditioning system is installed ),

 

 

 

C: smaller dust granularity. It is best to paint the walls and their roofs.

 

D: suitable information-to-noise ratio for transmission lines.

 

E: Nic problem: select a NIC with good quality.

 

F: Software Configuration Setting: the software is valid. If you do not need to set an IP address, the system will automatically allocate it. If you want to set DNS correctly. The system is WIN98 or ME. In DOS, type WINIPCFG to obtain the DNS region; in WINXP, Type IPCONFIG. The software should be properly set: when the local connection of the ADSL user is restricted or there is no connection, a prompt will appear, which does not affect the internet access. The ADSL user is a dial-up Internet access and automatically allocates an IP address, if you do not want it to appear, right-click "Network Neighbor"-"properties"-"Local Connection"-"double-click" Internet Protocol "(TCP/IP)-use the following IP Address: 192.168.1.120 subnet mask: 255.255.255.0 Gateway: 192.168.1.1. OK.

 

 

G: TCP/IP protocol: browsing is abnormal. Try to delete the TCP/IP protocol and add the TCP/IP protocol again.

 

H: Humidity Effect: in rainy season or rainy days and high humidity areas, the insulation of the line is reduced, and the signal level is decreased, resulting in disconnection or unstable operation. Humidity accelerates oxidation, resulting in transmission interruption.

 

 

 

I: Temperature Impact: low temperature in winter, less problems for cats; high temperature in summer, "Cats" are afraid of "Fever ".

 

 

J: After the network is activated, all original technical data: for comparative analysis in case of a fault, which is conducive to Fault Judgment and positioning.

 

2. Good grounding system:

 

According to the Regulations (grounding device construction GB50169-92) requirements: grounding must have more than two "independent" (not public "Ground") Grounding pole, the multi-strand copper wire from the grounding pole to the work location is not less than 16 mm², And the grounding resistance of each "independent" grounding Pole must not be greater than 5 ohm. The user line shield is grounded immediately to minimize interference. The tap water pipe and power (N line) cannot be used as the grounding pole, and the grounding wire cannot be wound. After being coated with silver conductive paste, the user shall be fastened with screws. Lightning: disconnect all lines connected to the outside world to avoid personal accidents and fire accidents.

 

Iii. System cleanup:

 

People wear clothes not in their grades, but in whether they are clean and tidy;

 

 

Therefore:

 

 

 

A: legitimate software, promptly upgrade patches, delete unnecessary files, promptly clean up Internet spam, and regularly fragment and optimize the system structure;

 

 

 

B: valid anti-virus software, which often upgrades the virus database. Firewall, Internet sharing software, and network acceleration software are properly set. Improper configuration also affects user use.

 

 

C: Do not place non-running software or other files on the running disk or desktop. If you open some software, the software may be disconnected and uninstalled.

 

 

 

D: at ordinary times, the computer (including auxiliary) equipment should be monitored and maintained to ensure that the equipment is clean, well ventilated, the connection contact resistance should be as small as possible, the temperature and humidity are moderate, the insulation is good, and the wiring is neat and beautiful.

 

4. Good link: Check the host and all auxiliary devices (keyboard, mouse, speaker, (five-class line) network line R45 connector, ground line, power supply multi-purpose board, power cord, etc.) must be in contact with the resistance in Ω) good. Check whether the connection and telephone line plug of the home line are in contact with (Ω) reliably to reduce line faults. Wiring: Balance vertical, clear and tidy (not wound ).

 

5. Reception level under severe conditions (Wireless Network Adapter: Reception field strength, optical terminal: received optical power level ). Wireless users: Because the distance between the user terminal and the base station is different, the received field strength levels are also different. Therefore, the terminal and base station AGC are particularly important. The client computer must work with the AGC of the carrier equipment to provide reliable reception (high noise) of useful signals under different field strengths.

 

 

 

6. The higher the out-of-band isolation, the better the intra-band attenuation. users such as xDSL, broadband, wireless, and optical fiber must provide the least intra-band attenuation (less than 1 dB ), out-of-band isolation (greater than 60 dB ). The information-to-noise ratio is also greater than 60 dB.