My friend s telecom community broadband suddenly couldn t go to the Internet

There are many possible causes. Here are a few common ones.

1. Entering the wrong password multiple times leads to the account being blacklisted.

2. The network card is broken.

There was a problem with the 3 line.

4. The power outage in the switchboard room of the network service provider.

In fact, it is not meaningful to discuss these reasons above. In the case that you don't know much about this. The best and fastest solution is to call customer service.

He will ask you what the error prompt is and make a preliminary judgment. If it's a small problem like getting on the blacklist, it can be solved right away.

If it's something else, just ask your staff to bring their own laptops and professional testing tools to your friend's house for testing.

Remember, finding customer service is always the fastest way to do it, because they are professional and much more effective than listening to someone say this and that here.

Hope it can help you, and I wish you a speedy solution.

Do you mean LAN or ADSL by cell broadband?Check how you use the Internet before you can judge. Check to see if you need to connect to a broadband connection before surfing the Internet.

That is, adsl dialing, the kind with account number and password, if this way, look at the prompt when you connect, if it is 691, check whether the username and password are wrong, re-enter once, and contact the computer if not. If it is 678 or other prompts, please contact Telecom directly. If you are surfing the Internet through the gateway, then ping your gateway in operation, and you can see the IP allocation in the status item of the network card, which includes settings such as IP, gateway and DNS.

If the ping can't be done, ask the administrator of your community to deal with it. If it is ping, check if your DNS is wrong. If you don't understand, you should call Telecom and find Telecom directly.

There are a lot of problems, and I'm just engaged in maintenance.

First of all, if you can't afford to surf the Internet, there will be an error**.

The meaning of each ** is different.

691: Wrong password. First make sure you don't have broadband expirationIf it doesn't expire, then you try to call customer service ** and ask it to check the status of your broadband accountIf everything is normal, then you turn off the MD and re-enter the user ID and password.

678: This is generally an external line problem, or a computer room problem. It may be that the MD is broken, you have to check how many lights are on the MD, do you first see if the incoming light is on?

If the incoming light is the adsl-link light, if it is normal, (normal is not flashing.) You can reset the MD, there is a reset hole. To discharge the computer again, you just remove the power cord and turn on the computer.

It is cell broadband, which is called LANIt's similar to the above and the method, but you can't see the indicator, do you see the local connection connection? If not, see if the network cable is connected.

Hope it helps.

The 676 may have to be turned back on.

1. Check whether the network cable is loose.

For most broadband users, ADSL is the most common way to connect to the wireless router, and when the connection is dropped, the first thing we need to consider is the line problem.

Due to the fact that the first line is too long, there are too many connectors, or there are some interference sources, it is likely to cause the line to drop, and the network cable that is inferior and does not meet the standard often causes network instability, so when you find that the line is dropped, you must first check whether the network cable interface is loose.

If you find that the network cable interface is intact, you should check the problem with the power signal light.

Second, whether the power signal light is always on.

If the power signal light is not on, the first thing to check is the power supply. For example, whether the connection is disconnected due to the unstable power supply of the mains, whether there is a problem with the power supply of ADSLMODEM itself, etc.

Touching the ADSLMODEM shell with your hands, it feels very hot, at this time, you may wish to temporarily turn off the ADSLMODEM until it cools down before turning it on, or place it in a more ventilated position, which can also eliminate the disconnection fault.

3. Check whether the data signal is normal.

If the data signal light is not on, it is likely that the line is open, short circuit, etc., and then pass the ** test to see if the line is normal, if not, you can ask the technician of the ADSL service provider to solve this problem.

If the data signal light is flashing, it is likely to be caused by poor line contact, you must check whether the extension is used, whether the connector is firm, whether the ADSL connection line is too long, etc. If the data signal lamp still does not turn on after checking the above steps, the fault is not related to the line, and you can continue to look for other reasons.

If a yellow exclamation mark appears, the network is restricted, first take down the router, connect the network cable directly to the computer, and then dial to see if it can connect to the network normally.

If it can, then the router is restricted, you can reset the router to see, if not, it may be that the router is locked, and you need to unlock or reflash the router.

China Telecom Corporation is a large state-owned communications enterprise in China and a global partner of the Shanghai World Expo, and has been selected for many consecutive years"Fortune 500 companies"It is mainly engaged in comprehensive information services such as fixed **, mobile communications, satellite communications, Internet access and applications.

As of the first half of 2011, it had 100 million fixed users, 62.36 million mobile users (CDMA) and 61.74 million broadband users. The total assets of the group company are 632.2 billion yuan and the number of employees is 670,000. In May 2016, the first batch of "Enterprise Demonstration Bases" for entrepreneurship and entrepreneurship was launched. [1] In August, China Telecom Group Corporation was in"2016 China's Top 500 Enterprises"ranked 29th in the market.

2] On December 21, 2017, China Telecom officially issued an announcement that "China Telecom Corporation has completed the corporate restructuring". According to the announcement, China Telecom Group Corporation completed the corporate restructuring and went through the industrial and commercial change registration procedures at the Beijing Administration for Industry and Commerce on December 15, 2017. After the change, the enterprise type of China Telecom Group was changed from an enterprise owned by the whole people to a wholly state-owned company.

The name of the company was changed from "China Telecom Group Corporation" to "China Telecom Group ****".

The Chinese name of "Tianyi" is intuitively related to flight, wings, and sky, reflecting a free and easy mobile experience and broad coverage; "Tianyi" and "Tianyi" are homophonic, which means that users can experience mobile information services more freely and enjoy a new life of higher quality and freer information after using China Telecom's mobile services. "Tianyi" is a brand born for China Telecom to develop 3G business, which was first endorsed by Deng Chao to promote its healthy, high-speed, convenient and wireless 3G network to the majority of mobile phone users, so as to introduce and choose CDMA2000 as the 3G network of the network standard to customers.

The DHCP router automatically assigns an IP address, which itself occupies an IP address of OR OR. The IP itself can be set. After setting the IP of the router itself, the rest of the IP is automatically assigned, and when there are two or more devices at the same time when the allocation is encountered, the IP conflict will be caused.

Of course, when the default IP address (the original used IP will be the default) is different from the newly assigned IP, the newly assigned IP will also conflict with the device that originally obtained the IP by default. Another is that the IP of a device uses the IP of the router, which will also cause IP conflicts.

The best way to solve this problem is to use static routes, and the methods are:

1. Bind the MAC address and IP. In this way, the instructions will be followed when the automatic assignment is made.

2. Set a static IP address on the device, and set a different IP segment for each device. In this way, only the data link of the specified IP is passed through the data connection at the time of data connection.

3. Use the above two types at the same time, but pay attention to the binding IP and terminal device settings.

Reset your router settings. Then change the wireless password.