A person gets used to good things very quickly and for a long time. Previously, it was somehow quite normal for most people to live without telephones at all, although if necessary to call relatives in the nearest city, they had to go to a call center. Now, if the first time it is not possible to get through to a mobile phone, some immediately panic, one has only to hear: "The subscriber is temporarily unavailable." What does it mean? What happened? Where did you disappear to? It may even start to panic. Let's try to understand this issue.
The easiest answers to the question
First of all, you need to understand that a mobile phone is an ordinary device stuffed with electronics, which has a battery and an on / off button. Therefore, the reason for the lack of communication may be that the phone is simply discharged or is turned off.condition. In this case, you will not get through to the subscriber at all in the near future.
But the most annoying thing is that on the second or third dialing, the connection is made, and no one says any messages. Many have anger towards their operator and a desire to change him. Meanwhile, the reasons can be very different. And you don't need to worry too much when you hear in the receiver: "The subscriber is temporarily unavailable." What does it mean? It could mean anything.
Some information about the principle of mobile communication
It turns out that the mobility of a modern phone is its weak point. If there is no connection between two conventional devices, then there can be only two reasons: the lack of contact between them or the breakdown of one of them. In our case, everything is more complicated. After we dial the number and press the call button, the radio signal goes to the base station, then to the switchboard, where it undergoes secondary processing and, along with other calls, is sent to your operator, to the switchboard. It stores data about all subscribers and determines the ability to make a call, location, tariff plan, and so on.
At the next stage, the call goes to the subscriber of the same network or is redirected to another one. There he makes almost the same path. When the person you are calling answers, the connection is established and then the signal is sent back. It may seem that the route is too long and problematic, but it is not at all the case. Beforeus is a very reliable system that handles thousands of calls per second.
After all, what does "Subscriber temporarily unavailable" mean?
Errors may creep into the designated route. The radio channel between your device and the base station is the most vulnerable point. An indirect indicator of the quality of communication is the level of reception on your phone. When it is small, the probability of error increases. Why and where does it fall?
The signal strength is decreasing due to obstacles between you and the base station and your distance from it. In some places, the signal may disappear altogether: in elevators, basements, on the first floors, deep inside large buildings that have metal fittings and thick walls. Sections between metro stations and road tunnels are also not the best places for mobile communications. A failure can also occur from the reflection of electromagnetic waves from various radio equipment, a base station and a telephone in dense buildings. Operators in this case increase the number of transmitters and use an increased frequency range. Nevertheless, connection problems are possible. Therefore, when you hear "The subscriber is temporarily unavailable, call back later", follow the advice - call back later.
Other causes of problems with mobile communications
Sometimes, fortunately not too often, switches and base stations are overloaded. This happens on big holidays, weekends, in places of mass events or in the area of a large traffic jam. And if the lasttwo examples are local, the first two are global. There are many other reasons, so obviously imperceptible and occurring less frequently. Communication between the switch and the base station is transmitted in the form of signals over digital transport channels: these are wired, optical and microwave communication lines. They can be affected by various factors, such as lightning strikes, rain, power surges, equipment malfunction, construction work, and so on. During the work, workers tear optical cables, cut the antenna feeder. All of these trunks have back-up protection, but there will be no communication for a while until the switch is completed.
If the subscriber is temporarily unavailable, what else does it mean? The switch software or your phone may freeze. Fortunately, operator equipment rarely fails for this reason.
There are two other important factors in communication problems. The first is that some subscribers actively use the telephone as a means of accessing the Internet. In this case, getting through to them is sometimes difficult. The second case, when the subscriber is temporarily unavailable - what does this mean? Sometimes - nothing good: the phone was stolen and the SIM card was thrown away.
What to do when it's impossible to get through to the subscriber?
Very often, by evaluating the situation, looking carefully around or at the phone's display, one can make guesses about the cause of communication problems. It happens that a person wants to make a call,being far from civilization, but did not look at the fact that there was no signal reception level. Get closer to the settlement and try again. Do not make calls in the subway and other similar places. If you get caught in heavy rain and thunderstorms, wait until nature calms down. Seeing that the mobile phone is frozen, restart it, and the connection will appear. And the most important rule: if the subscriber is temporarily unavailable, call back later. And let's hope that with the development of technology, many of these problems will disappear.
