This is only a working system if there is only one telephone device

This is only a working system if there is only one telephone device
Build a telephone network: is the most popular telephone server-
Although various information exchange systems have been developed, such as e-mail and instant messaging services, ordinary telephones will remain the most popular communication method for a long time. A key event in telecommunications and history is the emergence of voice transmission technology, so the concept of telephone has changed in recent years. The use is modern, convenient, and cheap, because remote offices can be combined without having to resort to the services of telephone operators. What other reasons do you need to upgrade the phone server? One of the largest server and client lists (session establishment protocol for user sessions, including video and voice transmission). There are 11 servers in this list. These servers are distributed under a free license, but administrators use most often-.
The call center, voice mail and conference functions eventually make it a powerful and easily expandable platform that can be used to create telecommunications services of any size. Support almost all popular telephone protocols (, .324, ), your own and some other protocols for video and fax. In addition to providing services for local clients, it can also transmit voice traffic between servers. There are modules used to interface with analog () and digital (1 1) lines.

If the functions are not enough, you can use your own language, use the language to create a module, or use a common interface to integrate with an external data processing system to write a dial plan. In order to simplify the development of modules designed to solve various problems, several levels (channels, applications, codecs, file formats) have been proposed. Therefore, new features (such as codecs) will soon appear in and can be easily implemented. In addition, the modular nature of the allows administrators to connect only the necessary functions to modify the system to suit their needs.

The client can be used in almost all systems, including. And device drivers are the only exceptions, they are not yet available on all platforms. Unfortunately, it is impossible to give a clear explanation about the hardware-too many nuances and nuances, so I refer to the. Page for approximate computer configurations. If your goal is to understand, you can use one of the distributions of the server that is already configured and working properly:,. Generate a nice package list, after installation, you can start configuration immediately. But installing from the repository has a disadvantage-usually, the version is far behind the current version, which can be downloaded from the official website. Therefore, we will consider the general installation method using the same example, although the above (with very few exceptions) applies to other distributions. The main types of integrated services digital networks). This can be done through the following repositories:-1. The compilation of the library is standard, so we will not repeat it.
After the script is completed, we will see the project logo and some information about the settings in the console. No longer respond to this command.
If there is already a configuration file in this directory, it will be renamed with the prefix. This step is optional, you can safely skip it). Many of the modules included in the kit are experimental. Only when you need to write information into the database, support 3 files and 324 protocol (. And the prompt of the management console indicates that everything is normal.
With the help of the special interface card of the ordinary telephone network, you should pay attention to whether the appropriate driver has been implemented as a kernel module. However, even if there is no such device in the computer, it is still recommended to install these drivers. The fact is that all devices have timers, House aguamar saptarang and this is necessary for the complete operation of the telephony server. However, if you don't have a device, you can use a special driver-emulate it.
After executing this command, a script will be created to automatically start the module and, (or,) to indicate which module should be loaded. I recommend keeping only what you need in the file. Detailed descriptions of various devices are provided in the documentation. You can read this document in Russian. But we will not stop there, we still have a lot of work to do. After the configuration is complete, we use the command-to check the work. But the length of journal articles will make us understand only some of them. For example, specify the directory that will be used during the operation, the location and owner of the socket used to connect to the remote console, and the default server startup parameters.

Each of them is represented by a separate block in the file, which starts with a table of contents and is enclosed in square brackets. Parameters in. He will only be allowed to answer incoming calls, and peers can only be called, which means to perform all operations at once, that is, user + peer. The host field specifies the address that allows the client to connect. If it can connect from any address, specify =. In order to call the client (not yet registered) in this case, you should write down the address in where you can find it at any time. In the username and password, we indicate the login name and password used by the client when connecting. The Ohm in the corresponding field must be set to Yes. Disabling will force all voice traffic to pass through. If the client supports re-invitation, you can specify = to allow them to connect directly. The с field defines the dial plan, the call plan falls into the client's call, and-the string that will be displayed when calling from the client. By default, the default context is used, and it will get all settings from the presentation context. The latter is for demonstration purposes only, you need to create your own context in the working system.
-Account, our customers can register on the server and make calls. In order for them to receive calls, they should refer to a document describing the dial plan for distributing calls in the system. All allowed extensions are also listed here.
If he does not answer the call, he can leave a message in the voice mail. The number after the number indicates the priority, which determines the order of tasks. Now, if it is running, it should be run on the same computer-connect to its console and use the command to force it to re-read the configuration file. There are also commands for reloading specific files. For example, use the extension command to re-read the dial plan. For example, I like the free version of the easy-to-use program (previously called ). There are versions for, and. Another nice and multi-platform client is-. If everything is ok, a message should be displayed in the console, such as dial the number and make a call. In the smallest configuration, this is far from what it can do. Connecting to another phone server, waiting for calls in the background, parking music, billing, using to manage the server, etc. are still behind the scenes, but in the following article we will try to fill these gaps. Modern technology is going deep into our lives.
One day, a friend of mine asked me to visit his server. How Do Telephones Work? (Mr. Wizard)