Guangdong Telecom Crashes for Hours! What is the biggest mobile communication disaster in history?

Tech 2023-06-09 01:09:42 Source: Network

Can your telecommunications card still work At around two o'clock in the afternoon, Xiaolei's words made half of the office people lift their heads and say, "What "My mobile phone has no signal, are you normal?" Before raising this question, Xiao Lei has checked the balance of the mobile phone card, turned on and off the Airplane mode three times, restarted the mobile phone once and inserted and pulled the mobile phone card once, and finally failed to "reactivate" my mobile phone card. Moreover, after using the mobile card in my phone to make a call and connect it, I am even more confident that my phone is not malfunctioning

Can your telecommunications card still work

At around two o'clock in the afternoon, Xiaolei's words made half of the office people lift their heads and say, "What

"My mobile phone has no signal, are you normal?" Before raising this question, Xiao Lei has checked the balance of the mobile phone card, turned on and off the Airplane mode three times, restarted the mobile phone once and inserted and pulled the mobile phone card once, and finally failed to "reactivate" my mobile phone card.

Moreover, after using the mobile card in my phone to make a call and connect it, I am even more confident that my phone is not malfunctioning. Is it possible that the telecom has crashed? So, there was the question at the beginning. After Xiaolei's reminder, colleagues using telecom cards around started checking their phones.

Me too, how come there's an X symbol on a phone? "" Sleeping on X, my signal is also gone. "" Call my phone to see? "" I just saw it, and thought it was broken

Source: Zhihu

The continuous exclamations and roast convinced Xiaolei that it was not me alone that had a problem with the telecom card. His heart finally fell: "At least I can be sure that it is not my phone or phone number.". At this time, some friends of Xiaolei also began to roast in the group: "My phone number suddenly couldn't get the call, and the takeout just ordered had to wait for more than an hour because the phone couldn't get through.".

This friend of Xiaolei and I are not in the same city, but far away in Shenzhen, with a straight-line distance of at least two to three hundred kilometers. Therefore, it can be basically determined that this fault is not only limited to the surrounding area of Xiaolei, but also to Guangzhou city, but also a large-scale network fault problem.

Source: Network

Thinking of this, Xiaolei opened his microblog search and found a large number of roast and inquiries:Can your telecommunications card work

Telecom, collapsed

From feedback from Weibo users, it can be seen that the issue with this telecommunications malfunction may affect the entire Guangdong Province. Friends in Shenzhen, Huizhou, Dongguan, and other places have reported to Xiaolei that their telecommunications cards are indeed unable to make phone calls.Judging from Xiaolei's shallow knowledge of telecommunications, the degree of Guangdong Telecom's malfunction, if placed in a major internet company, would definitely reach P0 level, undoubtedly the highest level of accident.

In fact, this is not the first large-scale failure of Telecom this year. If you pay more attention to Internet news, you may remember that on March 29, online services of Vipshop, Tencent and other companies all had a wide range of failures, and online shopping malls, WeChat Pay, WeChat dialogue, Qzone, QQ mailbox and other services were unavailable.

Source: Vipshop

Vipshop aside for now, WeChat and QQ, as national social apps, are used by a large number of users almost every second, so the hot searches related to WeChat QQ malfunctions have almost rocketed onto Weibo hot searches. In the netizens' questions and roast, WeChat, Vipshop and other affected enterprises have issued announcements one after another, saying that this failure was affected by the failure of the computer room and is being fully recovered.

Perhaps you have already guessed, yes, the problem is a network computer room set up by Telecom in Nansha. Due to a cooling system failure, the temperature of the equipment in the computer room rapidly increased, triggering a security protection mechanism, and a large number of devices were forcibly taken offline, resulting in network service downtime. In theory, this is an accident that should not occur. As an important network infrastructure, most computer rooms will have a backup system, with the aim of quickly taking over the original work in the event of a main system failure and ensuring the normal use of users.

However, from the perspective of this accident, it cannot be said that the backup system is useless, only that the time it takes to function is really slow. The backup system is generally required to be directly online in a short period of time, but Vipshop and Tencent ultimately took a lot of time to re launch the system (among which Vipshop took more than 12 hours), so no matter how much responsibility the computer room manager is held internally by Telecom, Tencent and Vipshop have both dealt with many management positions.

Source: Baidu

Among them, Tencent did not disclose the final amount of losses, while Vipshop stated in the announcement that the failure caused the company a loss of over 100 million yuan. Considering the size gap between Tencent and Vipshop, Tencent's losses would only be greater. If the accident had not occurred in the early morning, billions of yuan in losses would have been possible.

Perhaps you think I'm exaggerating, but in fact, Tencent has already released its mini program GMV data for 2022, with annual GMV reaching trillions of yuan. If it goes down during peak usage, the consequences would be unimaginable.

Speaking of this afternoon's accident, it's different from the network room malfunction,The main cause of this malfunction is the call line, and telecommunications broadband and mobile data networks have not been affected. Even on the iPhone, there is a strange signal zero grid, and the internet is normal.Even because network data can still be used normally, many people do not realize that their call function is malfunctioning. Only when ordering takeout and receiving verification codes, do they suddenly realize: "Why hasn't there been any activity for half a day

Source: Lei Technology

Many netizens even thought that their phone card was in arrears and only realized it after charging a few hundred yuan: "If you owe, you should not be able to access the internet." They then looked online and found out that there was a problem with the telecommunications industry. Some even thought that the phone was broken and placed an order for a new smartphone directly on JD.com.

Image source: Weibo

Although there is a lot of fun, it also reflects our trust in the network infrastructure. When we see the Mobile phone signal problem, we don't doubt the operator at the first time, but doubt whether it is our own problem. For most people, although there are not many opportunities to make phone calls nowadays, communication phones, as the core function of mobile networks, can directly affect all aspects of our lives if problems arise.

For example, some elderly people in remote rural areas generally do not use online social media and rely solely on phone calls for external communication. If there is an emergency during the outage of the communication network, they will be unable to contact their family or friends in the same village, as well as emergency calls such as 110, 119, and 120. If they are also affected, the consequences will be unimaginable.

How did telecommunications collapse?

Regarding the telecommunications malfunction, the official has not yet provided the cause. Currently, only some telecommunications employees' replies and fault notices can be seen online. In one notice, it was stated that the first fault notification time was at 15:25 pm, while the fault occurred at 14:18 pm. The fault level reached an important level B (now estimated to have been raised to level A).

Image source: Weibo

From subsequent feedback, it was not until 16:30 pm that the affected communication network gradually recovered, indicating that the entire communication network in Guangdong Province had malfunctioned for more than two hours. The interruption of the basic communication network for two hours, anywhere it is placed, is a very serious accident, and the number of telecommunications users in Guangdong is as high as 188 million (data sourced from the network).

Regarding the cause of the accident, Telecom has not provided an official response yet, but various rumors have been circulating online, and some telecom industry practitioners have also provided their own speculations.

For example, some people say that Telecom upgraded its high-definition calls at noon, resulting in a system malfunction that resulted in the server being "sent away".

Source: Zhihu

Some people jokingly speculate whether telecom staff accidentally clicked on the global block when deploying signal blocking for the college entrance examination. Of course, this is definitely a joke. Not to mention that some regions use signal blocking cars, and the signal blocking for the college entrance examination is even turned off, so there will be no situation where one can access the internet but cannot make phone calls.

Source: Zhihu

In addition, another WeChat official account of a red guest said that the 0Day vulnerability of the telecommunications equipment had been exposed, leading to the intrusion of key equipment.0Day is a technical term in network security, specifically used to refer to those highly harmful vulnerabilities that can be directly exploited by attackers and invade critical areas of the system. Once exploited in critical systems or facilities, it can lead to system paralysis or serious security accidents.

Source: Zhihu

However, key facilities, from hardware to software, are generally subject to layer by layer review, and almost all use domestic devices and systems. Unless it is a deeply hidden hardware level 0Day vulnerability, it will be found and cleared before deployment. Moreover,Key facilities basically have direct backup systems that can be switched over in a short period of time, so many industry insiders are inclined towards system level issues regarding this failure,At the same time, it is not ruled out that an undetected 0Day vulnerability exists.

According to some users of Guangdong Telecom in other provinces, their telecom phone cards have also been affected even as far away as Beijing and Shanghai. Some argue that it may be due to a database issue, which temporarily removed Guangdong Telecom phone numbers from the network and prevented them from directly obtaining authentication from the base station. This is why there are failures such as finding no such numbers and returning.

Source: Zhihu

Of course,These are just speculations, and the true cause of the accident still needs to wait for telecommunications announcements or accident reports to be known.Anyway, this is a very significant accident. Guangdong Province, which has been affected, is not only the largest user province of telecommunications, but also the province with the highest GDP in China. The impact of a communication interruption that has affected the entire province is unimaginable.

last

With the increasing importance of the internet in our daily lives, I think many people can no longer imagine what a world without the internet would be like. This failure has only affected the communication network, and the impact on people who use online chat tools such as WeChat for daily communication is relatively small. However, if the entire network is interrupted, it may directly cause social panic.

For operators, the importance of today's network infrastructure is self-evident, and they must have prepared various plans in advance. Even so, the network of the whole province is still interrupted for up to two hours. Whether from the perspective of Critical incident technique or disaster recovery capacity, Guangdong Telecom has made a "big picture" this time, hoping to take this opportunity to optimize disaster recovery capacity and crisis processing speed, After all, no one wants to suddenly be disconnected for a few hours in the future.

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