Port number can accommodate voice gateway phone board

Port number can accommodate voice gateway phone board
install software - -
We use the electrochemical sensor-2562 as the gateway-486-Ethernet to determine the carbon monoxide.Connect the precipitation sensor to-2562 to measure the content in houses and other objects. 2562 connect 4 camera Hikvision-2 2743-walkie talkie 2.0 golden rooster- 15- Story- A more versatile weather station 2.

I will try to explain the tasks that modern communication systems in private houses can face.
Currently, digital technology is developing very rapidly. But not only are developing some specific solutions or products, but also developing communication methods, interfaces, and interaction protocols between systems. Digital solutions are integrated with each other, and all content revolves around, mobile solutions and digital communications are integrated. Open source projects play an important role in this process. For example, I hope that not only can I make landline calls from any phone in my home, but I can also call and receive home calls from. I want to connect to a gateway to redirect calls at home to a phone at work or mobile phone when no one is at home. By choosing the correct mobile tariff, you can minimize the cost of calling from a home phone to a mobile phone. I want to configure multiple gateways to automatically route long distance and international calls from any phone in the house to the correct service to ensure the lowest cost per call. I want to organize a voice mail, which can be listened not only through the phone, but also through or from anywhere at home. I want to organize the automatic routing of all calls through or other parameters, so that the calls at work can be transferred to the calls in the office and the calls in the school are transferred to my wife. It is best to use a password to organize the voice menu so that you can control any device in the house by voice or. Finally, you can even enter the doorbell or the doorbell at the entrance to automatically send it to the mobile phone. I can clearly say that no one is home. This is only a small part of what can be achieved with modern software solutions. There are many other interesting ideas. For example, often in hotels abroad,-Internet is free. But not everyone has. You can use to connect to your home star and dial the desired city number for free. I think even such a small description is enough to make you agree that in your home, especially to some extent, smart, free asterisks are unlikely to be redundant. In this article, I am not going to describe in detail the installation process on. I will limit myself to certain points, but I will describe my experience in more detail and some nuances that may be useful to readers.

However, if the telephone line is connected to the house, this procedure alone is not enough. A gateway is required that will allow computers (acting as miniature automatic telephone exchanges) to connect to the analog telephone network. Traditionally, this type of hardware is called a gateway. The gateway is external-the most famous are -, etc., and appear in the form of a card built into the computer:,. The gateway must have Stone Park ciekawe beginnt at least one port. In fact, the telephone line is connected to this port. At home, you can use ordinary analog phones-ordinary, Siemens or phone:, -, etc. To connect an analog phone, a port must exist in the gateway or card. In the external gateway, the number of such ports is usually 1-2, and 4-8 or more ports can be installed on the card. For example, if we have 3 analog phones in our home, we need 3 ports. For telephones, the situation is completely different. They are connected to the existing Ethernet, and there can be any number. They do not need any other ports. Currently, the cost of a port + a good analog phone is the same as that of a phone (about 2501 rubles). Channel, but the necessary functions of the channel are created by installing the so-called. For example, you can install 4 101 mezzanine layers on this board, and then get 4 ports or 3 and 1 for external wiring. I also bought a 505 phone. But there is a warning about modules. Installing from the repository is exactly the same as installing from source.

If we will use an analog board).

Currently, it may contain irrelevant information. Yourself, then you need to have all the necessary tools in the system:, ++, -, 5- etc. (use-install). Now, let us configure all plugins starting from version 1. The script will write the configuration file itself according to the installed device (we are talking about the board). However, despite the wide variety, the main parameters are still contained in the file and extension.

Now you need to register the dial plan, the route in the extension. In this way, you can make calls at home and make external calls. After making any changes to the configuration file, you need to issue a command to reload the settings.

-The process is greatly simplified, but like any machine, it does not always perform correctly. Automatic configuration will help form the foundation, but fine-tuning must still be done manually. The initial test showed that everything is normal. Calls in the home network between analog phones and digital phones are passing. Each of them can dial the city number. Although the call quality is not very good, it is still good. During the experiment, I noticed a certain sound when calling from the phone. Something is missing.

It is confirmed by internet search that this is a common problem of 510 series phones. Some users connect the handset from an analog phone to the phone and find that the sound quality and volume have improved. Obviously, Cisco discovered the problem and released firmware to try to correct the situation. After installing the firmware and changing the "input gain" parameter in the "Phone" tab of the phone interface, the situation has been greatly improved. The sound quality and subjective feeling during the conversation suits me very well, although I will not give the highest evaluation. The only thing that is still hindered in some way is the situational echo. In the case of dialing an analog phone, this technology is very common, and some people even say it is a common phenomenon. As long as speech leaks from the transmission path to the reception path, an echo will occur. There are many reasons for this leak. The most common cause of echo is the nature of analog data transmission, which is related to the unbalanced cores and different characteristics of the two-wire line. When voice is transmitted from the speaker to the microphone at the receiving end, echo also occurs. In a normal (analog) telephone, the echo occurs in a small proportion, but because the transmission delay of the human brain is short (less than 51 milliseconds), it will not cause any discomfort. In digital networks, due to audio coding and transmission on various digital channels, the transmission delay is significantly higher, and the echo with a delay of 51-301 will cause serious problems. The algorithm is free and is installed in the latest driver by default. There is another proven algorithm, which was developed for 401, but I don’t know if it can be used with 411 board. Usually, in my case, 2 reduces the echo to an acceptable level, but in some cases it is still noticeable. Free licenses for proprietary echo cancellation algorithms are provided to all customers. In order to use this algorithm, you need to create an account on the website and register the serial number of the board. Then, you need to download and install the binaries from the site. Detailed instructions can be found on the website. All you need to do is to change the settings. system.
In some cases, a small echo can be heard, but its volume is several times lower than when using 2.
Echo cancellers for calling analog phones and lines are very useful, but there is an unpleasant detail. If two people are talking at the same time, the echo will try to capture and drown out the echo, but the sound from the other side of the wire will also be affected. This manifests itself as trembling, distorted sound, and even occasionally when it is completely non-existent. Together with the barrier, the echo cuts off the useful part of the conversation. But in this component, it performs better than 2. In actual conversations, although this effect sometimes attracts attention, it does not cause any major problems.

I continued to experiment to improve the voice quality, and tried other codecs 712 (, ), 727, 730 and 723. The source code lacks one of the modern 730 codecs, which allows you to keep the voice quality at the 712 level while limiting the bandwidth to only 8, but you can download the file by _ 730- 19- 4--87_65-2 Install from here. (The file name depends on the number of bits in the operating system, compiler, etc. Further experiments show that different codecs provide different communication quality. The 723 wideband codec showed good results, and by the way, the 505 phone supports this codec. The connection quality of the 723 codec is comparable to that of the 712. Therefore, I chose and 723 or 712 in the 1.8-411-505 bundle. However, it should be borne in mind that for other telephone service providers, other communication lines and telephones, the results may be different.
More information about configuring and using the 505.
First of all, the phone has no power! Since this model supports (Power over Ethernet) technology, the manufacturer clearly believes that no power supply is needed. But there is no on my network. The phone has 5 jacks as a backup power source. Somewhere in the basement, I found an old cheap Chinese power supply 6 0.8. The phone works normally, but sometimes it restarts automatically. My suspicion first fell on the power supply. Indeed, after replacing the Chinese miracle with the high-quality power provided by the old switch (53), the cell phone malfunction disappeared. The problem is not even that the Chinese power supply device provides 8.2 instead of 6, but does not provide the current required by the phone. The power supply device is designed for a current of 2 amperes. Use a high-quality stable power supply that can provide at least 2 currents. The dial plan has nothing to do with real Russian life.
After dialing any number, the phone will wait for a while before transferring it to to see if the user will dial more numbers. This is no problem, but it will cause some inconvenience when dialing a local number. For example, we dial 103 and the phone only rings after 1.5-2 seconds. Also, if we dial a long number slowly, the call may transfer it to without waiting for the dialing to end. To solve this problem, the following dial plan can be used. Numerical city numbers, except for city numbers beginning with 8. In the following article, I will discuss the experience of introducing further into the general information system. WATCH THIS before porting phone numbers to VOIP!