Shulou(Shulou.com)11/24 Report--

Thanks to CTOnews.com netizens 91 Louis Koo, ChiKwok, Qunlu, DingHao, _, zxh1293, soft media users 1520111, 1379 inspector, Xiao Zhan cut, tyhguan clue delivery! CTOnews.com news, June 8, update: fully recovered as of 19:24.

Starting from 14:15 today, a large number of Guangdong Telecom users reported that the network could not be used, and even their mobile phones called each other and landline phones prompted empty numbers. China Telecom Guangdong customer service replied that some mobile users were affected by network anomalies and had been reported to the provincial ICNOC for verification.

According to @ China Telecom Guangdong customer service: after emergency repairs, the affected users are gradually recovering from 16:30. I sincerely apologize to the customers who were affected during this period.

[fault notification]

The customer informed that Guangdong Telecom roaming to Shandong VOLTE users could not register and could not answer the phone normally. According to the analysis after reporting to the company, there is a problem that Guangdong VOLTE users are unable to register in all provinces of China, and the reason is on the Guangdong telecom side.

[scope of influence]

Guangdong Telecom calls abnormally from local and roaming users throughout the province.

[cause of failure]:

Preliminary judgment: link congestion between LDA and HDA, link congestion may be caused by abnormal Cisco Datacom equipment, resulting in packet retransmission and signaling storm.

[processing progress]: business is gradually recovering

1. There is congestion and retransmission between two sets of HDRA (Huawei and ZTE) and two sets of LDRA (Huawei 2) of Guangdong Telecom

2. The bearer device of the retransmission is a Cisco router.

3. Deploy flow control process in SBC and Cisco router isolation

[customer notification level]:

Xia Bing, first-level Vice President of Telecom Group

From the perspective of the scope of influence, the whole Guangdong Telecom has experienced large-scale unavailability of functions and unavailability of services for more than 30 minutes, which has reached the important level B.

By the end of April 2023, the total number of customers of China Telecom exceeded 400 million for the first time, with a net increase of more than 9 million this year, including 287 million users of the 5G package, a net increase of 19.27 million this year.

China Telecom officials did not give information such as the cause of the accident. However, some netizens reported that "the outgoing access rate of Guangdong fixed network IBCF network elements to Guangdong Telecom IBCF has dropped significantly", so some people speculate that there is a fundamental problem between the two systems, and it is not clear whether this problem is a network attack or a fundamental firmware problem.

As of CTOnews.com, China Telecom A shares rose slightly, closing at 6.17 yuan per share, with a market capitalization of 523.329 billion yuan.

Related readings:

"Guangdong Telecom network failure: mobile phone network disconnection, no signal, unable to connect to the network and make calls."

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