1. There are too few wireless channels in your mobile phone base station or too many people calling, resulting in insufficient channels between the base station and the exchange office and insufficient transmission channels, prompting you to be busy.

2. The mobile operator sets the mobile phone card as an IP phone card. Every call is actually an IP call, that is, we have an IP routing code such as 1795 1 to save money before making a call. When you make this call, especially at night, IP routing is busy, so you will often hear the prompt that the network is busy.

Extended data

Possible reasons for network connection timeout are:

The network is disconnected, but it often shows that the connection is not available, and the network is blocked, so that you can't get the reply data within the default waiting time of the program. The network is unstable, and the network cannot transmit the server information completely.

System problems, the system resources are too low to provide enough resources for the program to process server information, and the equipment is unstable, such as loose network cable and bad interface. The system was busy when registering the network and could not respond.

The network speed is too slow, such as downloading and watching videos online with BT multithreading, and so on. If you use shared bandwidth, you should also prevent others from maliciously occupying bandwidth, and the computer is infected with malicious software, computer viruses, computer Trojans and so on.

Repair application performance on LAN:

If the application that just installed or modified the settings has local network performance problems, please try to check the settings, system compatibility and software status of the application; You should also review the installation and setup documentation. For example, if the application supports bandwidth limiting, please check whether the bandwidth of normal communication is inadvertently limited too much.

Hardware compatibility will also affect the efficiency of LAN. For example, if an application encounters high latency when using jumbo frames, check that the network interface card (NIC) adapter and driver are installed correctly. In some cases, updates or patches may reverse poor performance.

After installing applications, patches and correct settings on hardware without compatibility problems, if the performance is still unsatisfactory, you should try other options. The problem is often because the server load is too concentrated and there are not enough network card ports, but too many applications are competing for the network.

Try to add a network card port to provide an extra link for the server to share the workload. NIC port bundling can provide bandwidth coverage aggregation for critical applications. Balancing workloads and moving busy applications to idle servers can also reduce bandwidth contention and improve performance.

References:

Baidu Encyclopedia-Network Delay

Baidu Encyclopedia-Network connection timeout