There are different types of intercoms. The main ones are:
The first type of doorphones makes it possible to simplytalk with those who came to know them. The second allows tenants at home to see who is standing at the door to decide whether to let a person into the entrance. The negotiated type of intercoms is most often used in urban high-rise buildings. Such devices do not require large expenses for CCTV cameras. Audio and video intercoms are much more expensive and therefore used much less often.
Among the various firms producing control rooms, the most famous are:
The above are the most common speciesintercoms. All of them work on the same principle: the tenants of the house open the door with special keys. Each such device has its own unique key, which unlocks it. Only after that the door can be opened. If a person who does not live in the house tries to pass into the house, then, accordingly, he does not have the necessary key and he must call the apartment to be admitted to the entrance. Without a doubt, this increases the control of people passing into the house and many times increases the security of tenants and their property.
As you know, they can break down from time to time.Often, even those who reside in the house can not get into the house. Or vice versa, the doorphone door can be constantly opened, then absolutely foreign people can enter the house. In such cases, call the wizard, which eliminates all the problems. But such repairs do not require absolutely any special tools or additional keys.
All because the intercom is a normal device.And to make it work, you do not need any special tools or skills. In order to "repair" it is enough to enter special codes with the help of buttons. And that's all. Residents who know them can always open the door even without using a key.
This is invented by the developers themselvesin order to facilitate unlocking the device. In the end, if you learn a few special codes, they can be used absolutely for any device and even in any other locality. They allow not only to open the door, but also completely change the programming mode.
Let's analyze the principle of keyless access by the example of one of the devices.
The door phone is one of the simplest devices for protecting a home from access by unauthorized persons, which residents of high-rise buildings enjoy.
To just open the door and enter the entrance, it is enough to know the universal code that will help to penetrate inside.
The doorphone code Cyfral ("Digital") can beeven too simple if there are apartments in the house with numbers completely multiples of 100. That is, such apartment numbers as 100, 200, 300 and so on until 900. In this case, the universal code for opening the doorphone Cyfral: 7272 or 7273 is used.
Procedure:
The first is to press the "Call" button.
The second is to enter the apartment number with the appropriate numbers.
Third - enter the code of the door phone Cyfral 7272 or 7273.
Depending on the programming of the device, either the first or the second password may come up.
If there are no apartments with suitable rooms in the entrance, then other combinations are used.
How to learn the code of the door phone Cyfral?To increase the security of the systems being manufactured, the Cyfral door phone company began to create different types of devices. This decision significantly improved the work of the company. But this does not mean that their programming is difficult to circumvent. Simply for different models Cyfral now use different ciphers.
In recent years, the ciphers of this device have becomea bit more complicated. All because new models now have additional microcontrollers and special programming. Using passwords designed for other doorphones, and combinations with apartment numbers, a multiple of one hundred, will not help deceive the device.
In order to bypass this model, it is necessary to proceed as follows.
Step 1. On the keyboard, type four zeros.
Step 2. Wait for the inscription "ON" and press the number two.
Step 3.Dial one of the following combinations - 123400, 123456 or 456999. These are the most common codes of the door phone Cyfral 2094. For each device, only one combination of numbers will fit, and you can select it by trying each one.
Once the correct password is selected, theThe F0 notification will appear on the display of the device. This is a kind of request for information that will give permission for access. In order to get it, you need to enter the numbers 601.
If the above actions did not help to pick upcodes to the doorphone Cyfral CCD 2094, and you can not use the complete identifier (device key), try changing the programming and setting your own password.
To do this, follow these steps.If the screen displays previous combinations, press the reset button. Next, enter the code information K0K. After that, you need to dial a combination of any four digits. If it turns out to be unique, these entered characters will become a new password after they are repeated. Now, to open the door, simply enter this combination of numbers.
These actions will not harm the device.But in the case of a real breakdown, masters may have difficulty in reprogramming. But they will be able to act in the same way and set a new password.
For this model there are also variouscombinations that help hack the device. But using them takes more time, and learning them is a little more difficult. Therefore, you can choose a simpler way to open the door: set a new password.
The principle of reprogramming in models of intercoms Cyfral CCD 20 and CCD 2094 is almost the same. So which combinations to use?
To begin with we introduce the following characters: K0K1234. After a short pause, you must enter the number five. After a special sound signal, you can type a new password - three or four digits.
If the entered combination is unique, after its re-dialing, these numbers will become a new password for the intercom.
Now you can enter the house without a key: when this code information is typed, the door will automatically open.
