After that, you're the computer maintenance engineer, 11th.

Eighth chapter Internet Class failures

An example of a definition

This is primarily a software and hardware failure related to browsing the Internet. Such as: cannot dial, cannot browse the webpage and so on.

Second, possible phenomenon of failure

1, can not dial, no dial tone, there is a noise dial, the internet off line;

2, Internet speed is slow, individual webpage cannot browse;

3, the Internet when the crash, blue screen error, etc.

4, can receive mail, but can not send mail;

5. Abnormal installation of network equipment;

6, other communication equipment connected with the modem is damaged, or vice versa.

Iii. parts that may be involved

modems, telephones, telephone lines, and local terminals. More similar to "LAN class failure."

Iv. Points of judgement/order

1. Environmental inspection

1) Peripheral and appearance inspection:

A. The wiring definition of mains is correct and whether there is ground wire;

B. Whether there is a transformer or other equipment near the external modem or other electrical equipment which can cause interference;

C. Whether the phone has anti-theft play function, whether the installation of IP Phone Dialer, fax machines and other external equipment. Whether these external devices are connected properly, and whether they are working properly (in the case of separate working and connecting machines);

D. Check whether there are more dust in the chassis, whether there is a foreign matter caused by short circuit, plug parts are plugged in place, no tilt;

E. Motherboard, modem or broadband Internet network card on whether the components have deformation, discoloration and other phenomena;

F. The interface between the network card is good;

G. Pay attention to components, components and other equipment whether there is odor, temperature anomalies and other phenomena occur.

2) Signal Line connection:

A. The telephone line is connected correctly, the telephone line is normal, the user's telephone is an extension, whether there is a call to remind;

B. Whether the telephone number dialed is limited;

C. Broadband Internet access its network cable definition is correct, can connect, conditional words will machine replacement environment (such as: to the neighbor home or back to the station) after testing to verify whether the connection problem;