Absolute_Codec_String Not Working In Dialplan

The solution is to make use of another necessary variable known as inherit_codec. This means, you presumably can enable the outbound name to barter a codec then pass that decided value again to the inbound leg earlier than media was established. This will then pressure the inbound leg to request the same codec because the outbound leg and remove transcoding. When calling the instance extension, the decision hits the XML dialplan and executes the directions contained within the action tags. First, the variable inherit_codec is ready to true after which the call is bridged to over SIP. Because we enabled the inbound-late-negotiation parameter, the codec has not yet been chosen for the inbound leg. The outbound leg then proceeds to connect to cluecon.com where a codec will be chosen when the far-end answers or establishes media. At this level the FreeSWITCH call origination engine will take the codec from the outbound leg and set it as the absolute_ codec_string on the inbound leg. Next, the media indication is passed across, which can prompt the inbound leg to barter media and offer the same codec because the outbound leg. This , nevertheless, does not work properly under NAT situations.

Introduction Routing calls is on the core of any FreeSWITCH server. There are many methods for carrying out the surprisingly complex task of connecting one phone to another. However, you will want to make certain that you have the basic instruments necessary to complete this task. The most basic part of routing calls is the dialplan, which is basically an inventory of actions to perform relying upon what digits had been dialed . The dialplan is damaged up into a number of contexts. Each context is a group of one or more extensions. Finally, every extension contains specific actions that can be performed on the decision. The dialplan processor makes use of regular expressions, which is a pattern-matching system, to find out which extensions and actions to execute. To make the most effective use of the recipes in this chapter, it's especially important to grasp tips on how to use regular expressions and the three contexts in the default configuration. Getting prepared You will want a text editor and at least one SIP telephone for this recipe. It can also be recommended that you just evaluation the phrase file on your language. For English that is found within the FreeSWITCH source directory in docs/phrase/phrase_en.xml. The phrase_en.xml file incorporates both the file name of each pre-recorded immediate as properly as the actual spoken textual content. Prompts are divided into sections similar to voicemail, IVR, foreign money, digits, and time. By far the most important collection of sound prompts is in the IVR section. In this recipe we'll create a easy dialplan extension that may learn again to the caller his extension number. We will use a phrase macro to handle the work of stitching collectively sound prompts and using the say application to read back the caller's extension quantity. Keep in thoughts that the ESL is only an abstraction library—you can connect with the event socket with any socket-capable utility, together with telnet!

The tips in this chapter will focus most of their attention on utilizing the event socket for some frequent use instances. Getting ready You will want a text editor and a telephone connected to FreeSWITCH as properly as access to the fs_cli for your system. You may even must have the ESL compiled and working for your scripting language of alternative (see Setting up the occasion socket Library earlier in this chapter). The language used in this is example is Perl, however the ideas apply to all ESL-enabled languages. When we are via we may have a simple script that can pay attention for a socket connection from FreeSWITCH, answer the decision, play a file, wait for a DTMF digit, and then exit. The dialplan socket application sends management of the decision to the process listening on the specified TCP port. This recipe will information you thru the steps necessary to get a simple call control script up and running. You may discover it simpler to know the information introduced right here if you're a minimal of somewhat conversant in the concept of TCP sockets. Make a test call from 1007 to a different cellphone, answer, then hangup. You will now have a file named sql.csv in your cdr-csv/ listing. This technique can be utilized to customise the sorts of data which may be saved. Using accountcode and a CDR CSV template permits you to tailor the habits as needed. Now we can restart the FS service or we will reload "mod_dialplan_xml" from the FScli. Once the modifications are into effect, we are able to test whether or not the call is getting routed by way of Plivo.

Configure a gentle phone with a default FS person and make an outbound call which matches the regex that we now have talked about for routing to Plivo. Now if all works we should get a call on the destination quantity. We can check the FS logs at "/usr/local/freeswitch/log/freeswitch.log". Other choices There are a couple of different choices in the settings part of cdr_csv.conf.xml. Setting this to true will simply trigger each call to perform an data dump when the decision hangs up. Note that this will dump both to the fs_cli and to the FreeSWITCH log file, so concentrate on disk area. This will determine which call leg or legs get a CDR. You can set this parameter to "b" to log solely the B leg or you can set it to "ab" so that you receive a CDR for each leg. Handling A and B legs is mentioned later in this chapter. Introduction Call element records are an necessary a part of the accounting process on any telephone system. They are additionally a useful useful resource for troubleshooting. FreeSWITCH supplies several totally different strategies for generating CDRs. The most typical method is to create plaintext, comma-separated worth information. Each line in the CSV file represents one phone name . There are other choices for processing CDRs, most notably using mod_xml_cdr to store extra detailed information about calls as well as using the event socket to process CDR info. What this guide covers Chapter 1, Routing Calls; getting calls from one endpoint to another is the first operate of FreeSWITCH. This chapter discusses strategies for effectively routing calls between phones and repair suppliers. Chapter 2, Connecting Telephones and Service Providers; telephones and service suppliers have specific requirements for connecting to FreeSWITCH.

This chapter will help in shortly getting your FreeSWITCH server linked to other VoIP devices. Chapter 3, Processing Call Detail Records; Call Detail Records, or CDRs, are essential for companies. This chapter discusses a variety of methods to extract CDR data out of your FreeSWITCH server. Chapter 4, External Control; FreeSWITCH may be managed externally by the highly effective and versatile event socket interface. This chapter presents numerous real-world examples of controlling FreeSWITCH from an exterior course of. Tagged dial plan, freeswitch, freeswitch channel variables, freeswitch core, freeswitch listing, Media server, Sip, sip modules. There are lots of different parameters which we will add it right here, like caller id and so forth. Replace the username and password with the Plivo endpoint credentials. Once the gateway file is created, we will either restart the service or we are in a position to run "reload mod_sofia" on the FScli. If the FreeSwitch service si began in foreground, we'll get the FScli, so we are ready to run the reload command directly on it. Once the FreeSwitch is working fantastic, we can start configuring the SIP trunking via Plivo. So first we have to create an external gateway to join to Plivo. I'm going to use the SIP endpoint created on the Plivo Cloud to initiate the connection. Go to "/usr/local/freeswitch/conf/sip_profiles/external/", here we can create an XML gateway config file. Getting prepared Be certain that you've got got configured ESL on your system and that you have followed the steps in Establishing an inbound occasion socket connection earlier on this chapter. The examples listed right here are written in Perl but the ideas apply to any ESL-enabled language. Of course, you will need a textual content editor and a SIP telephone registered to your FreeSWITCH server so as to test this instance. Launching a name with an inbound event socket connection Using an inbound occasion socket connection to launch a name is a standard requirement for some purposes, similar to outbound IVRs.

In a case like this it's advantageous to handle the generating of the calls in a non-blocking manner using the ESL connection object's bgapi() technique. This recipe discusses the way to use the bgapi() technique with the corresponding "Background-Job UUID". Establishing an inbound event socket connection An "inbound" occasion socket connection signifies that an external script or program is connecting to a FreeSWITCH server. The connection is inbound from the server's perspective. In truth, every time you run the fs_cli utility you are making an inbound occasion socket connection. This program comes with FreeSWITCH, as part of the default set up, and works in Linux/Unix, Mac OS X, and Windows. What is less well-known about fs_cli is that it is a wonderful example of an ESL program. Beyond that, anything that you are capable of do with fs_cli, you can do with ESL and the occasion socket. Indeed, it is probably certainly one of the most important instruments for interacting with your FreeSWITCH server. If you're acquainted with C programming then you might recognize the supply code for fs_cli. It is found in libs/esl/fs_cli.c under the FreeSWITCH source directory. It is considered a finest apply not to add a broad range of dialable numbers within the Local_ Extension without having the corresponding users in the directory. Doing so could make troubleshooting dialplan points tougher. As a reminder, be sure to execute the reloadxml command each time you modify the regular expression . Now mod_xml_cdr will load automatically when FreeSWITCH begins. However, if FreeSWITCH is already running then we have to load it manually. Simply issue the command load mod_xml_cdr at the fs_cli and the module might be loaded. XML CDR data will now be stored within the $FS_INSTALL/log/xml-cdr/ listing. To evaluation them, open the file conf/autoload_ configs/xml_cdr.conf.xml. We shall be discussing some of these options later on this recipe.

Introduction As its name implies, FreeSWITCH will "swap" or "connect" varied endpoints together. Part of that switching includes making semi-permanent connections to individual telephones or telephone service suppliers. Service providers are usually telephone companies or ITSPs . Read on to learn in regards to the many ways that FreeSWITCH can join your phone to the world. The recipes on this chapter will delve into the varied methods to connect FreeSWITCH to telephones and service providers. FreeSWITCH also can utilize a locally installed sound card by the use of the PortAudio library. The final recipe is for advanced users and discusses the topic of codec negotiation. The key to this operation is the highlighted traces. In the primary one, we set continue_on_ fail to true. This channel variable tells FreeSWITCH to maintain processing the actions within the extension even when a bridge attempt fails. After each bridge try, you presumably can then do some processing. Note, too, that we set hangup_after_bridge to true.

This is done in order that the dialplan doesn't keep processing after a successful bridge attempt. (For instance, if the decision to userA was successful, we would not need to call userB after userA hung up.) You could add as many further bridge endpoints as needed. Now we have to the setup the Dial Plan to route the outgoing calls via Plivo. Go to "/usr/local/freeswitch/conf/dialplan/" folder and add an extension on the "public.xml" file. The enter worth is matched in opposition to the regular expression within the pattern option. In most instances $ incorporates solely digits, so our pattern will capture these into the special variable $1. At this level we now have a little bit of logic to assist decide what to do. If the input matches the sample, then the actions within the node might be executed. You have most likely found out by now that the actions contained inside the match are executed sequentially. You can even see that phrase macros are not merely restricted to playing particular person sound files. You can name functions like sleep and say to customize the way the immediate is played to the consumer. You may even call a text-to-speech software when you have one put in. Uncomment this parameter to enable late-negotiation for all calls. At the fs_cli press F6 or issue the reloadxml command after which concern the command sofia profile inside restart. You are now able to experiment with codec negotiation. This sends the decision back through the dialplan on the lookout for a destination_number of 5001_ open or 5001_closed. We have outlined each of those locations with the extensions "office is open" and "office is closed," respectively. Now we are able to play completely different greetings to the caller—one for when the workplace is open and a unique one for when the office is closed. As a pleasant contact, for all calls, we play a sound file that says, "Good morning", "Good afternoon", or "Good night", depending on what value is within the channel variable day_part.

The execute_extension and transfer dialplan applications These two purposes both inform FreeSWITCH to execute one other a part of the dialplan. The primary distinction is that execute_extension will return after executing one other portion of the dialplan, whereas a switch sends management to the target extension. In programming parlance, execute_extension is like a gosub command and switch is type of a goto command. Once the decision hits the common public context, we attempt to match the destination_number area. The destination_number is generally the DID quantity (see the There's extra part under for some caveats). The make command issued above installs the MOH files in 8 kHz, sixteen kHz, 32 kHz, and forty eight kHz sampling rates . The default dialplan extension quantity will play the default music on hold files to the caller. The music is supplied by the module mod_file_stream. It is feasible to customise the MOH in your system by adding other streams. Press F6 or issue the reloadxml command from fs_cli. Dial 1411 from your phone and hearken to the options. For this check, dial the primary three letters of the final name (568 for "L-O-V") and take heed to the outcomes. This script runs constantly—a daemon in Unix parlance—and waits for socket connections from FreeSWITCH on port 8040. As soon as a socket connection is established, the script forks a toddler process. This baby course of then creates the ESL connection object $con. Once the $con object is created we are saying a greeting to the caller after which enter the outer while loop. This loop causes the script to exit if the caller hangs up.

The inside whereas loop uses the play_and_get_digits software to truly play the immediate and acquire the digits from the caller. We then learn again to the caller the digit she or he pressed using the say software. Finally, if the caller dialed the digit 9 then we are saying "goodbye", after which hold up. The youngster process then exits however the father or mother continues to be working. You can have multiple simultaneous calls in existence and each one will get its own course of. You can use this script as a template for creating your own interactive dialogs. All of the caller interactions take place throughout the inner whereas loop, so focus your attention there. Also, should you plan to play various sound prompts to the caller make certain to evaluate the recipe Use phrase macros to build sound prompts in Chapter 5. Getting prepared This recipe relies on the occasion socket interface to FreeSWITCH. However, there are lots of different ways of connecting to the occasion socket.

Navigate To A Directory Linux

The Tab key on your keyboard auto-completes names of directories and files you're starting to type. If you're going to cd into ~/Documents, then all you need to type is cd ~/Doc and then press Tab. This isn't just a pleasant convenience, it's also a way to prevent error. If you're pressing Tab and nothing's being auto-completed, then probably the file or directory you think is in a location isn't actually there. Rather than type every command, the terminal allows you to scroll through previous commands that you've run by pressing the up or down keys on your keyboard.

If you are writing the name of a file or directory as part of a command then pressing tab will attempt to auto-complete the name of what you are typing. If you want to move inside the tree, one option is to use relative paths. If you are in /home/sharon, then typing cd Downloads will work, because Downloads is an immediate child of your current directory. If you are in the subfolder Documents and want to change directory to Downloads, you have to go up (..) and then to Downloads. The shell uses the current working directory as the "root" or base directory for relative paths.

You can use theCDPATH environment variable to set another location as the base directory for relative paths. If you spend most of your time in a certain section of the filesystem tree, this can save you a lot of keystrokes every day. The /home directory on a Linux system contains a user's personal files, applications, and subfolders. You can simply run the cd command without passing any arguments if the $HOME environmental variable is set to your home directory path. If not then, the home directory has a tilde (~) character assigned to it.

This can be passed with the cd command to change the current working directory to /home without specifying the complete path of your home directory (/home/username). This is an example of changing a directory by giving an absolute path. In Linux, every file and directory is under the top-most directory, which is called the "root" directory, but referred to by a single leading slash "/". An absolute path indicates the location of a directory in relation to this top-level directory.

This lets us refer to directories in an unambiguous way from any place in the filesystem. On Linux and other Unix-like operating systems, the cd command can change the current working directory. Working in the current directory of a computer is also referred to as the user's current directory.

In this article, we will dive deeper into the cd command and give you a brief on cd up one level Linux. We've learned how to use pwd to find our current location within our file system. We've also learned how to use cd to change locations and ls to list the contents of a directory.

Now we're going to learn some additional commands for moving around within our file system. Therefore, our current working directory has changed to Desktop. The Linux cd command offers several ways to navigate and change the working directory using the terminal window. It lets you change directories using relative and absolute paths, move to parent or root directories, or find directories with incomplete names.

Ls is the command, with an option -F and anargument /. Sometimes options and arguments are referred to as parameters. A command can be called with more than one option and more than one argument, but a command doesn't always require an argument or an option.

Try navigating through your system using the terminal. As long as you restrict yourself to the cd, ls, and pwd commands, you can't do any harm, and the practice will help you get comfortable with the process. The absolute pathname is a complete path to the directory starting with the / folder whereas the relative pathname is derived from the current working directory. The ls command lists the content of the current directory . It can be used with the -l flag to display additional information about each file and directory in a list format. The -a flag allows you to view files beginning with .

The ls command lists the contents of the directory that you are currently in . The -la component of the command is what's known as a 'flag'. Dotfiles usually act as configuration files for software and as they are written in text, they can be modified by simply editing them. Linux cd command is used to change the current working directory ( i.e., in which the current user is working). The "cd" stands for 'change directory.' It is one of the most frequently used commands in the Linux terminal. On the other hand, the relative pathname is derived from the current working directory.

You can move up and down the directory tree efficiently with the cd command if you're well-versed on relative paths. After reading this tutorial, you should be able to use the Linux cd command to navigate and change the current working directory in the terminal window. It's used when you're in a shell session (for example, when you've launched a terminal window from a graphical desktop) to change the current working directory. So far, when specifying directory names, or even a directory path , we have been using relative paths. When you use a relative path with a command like ls or cd, it tries to find that location from where we are, rather than from the root of the file system. The current working directory is represented by a single dot (.) in Linux operating systems.

The parent directory, or the directory above the current one, is represented by two dots (..). The parent directory, in simple terms, is the directory that contains one or more sub-directories. Upon creating a new user, the contents of /etc/skel/ will be copied to the new user's home folder.

You can add or modify dot-files such as the .bashrc in /etc/skel/ to your requirements, and this version will be applied to new users. Before changing directories, we may need to list the current working path or other path directories. The ls command can be used to list files and directories.

This will display a list of folders in your current working directory and hidden files. However, to change the current working directory to of where you are, you can use the absolute path. Any path that starts with a forward slash / is an absolute path. Command line shells on Windows usually use the Windows API to change the current working directory, whereas on Unix systems cd calls the chdir() POSIX C function. This means that when the command is executed, no new process is created to migrate to the other directory as is the case with other commands such as ls.

This is because, when a new process is created, child process inherits the directory in which the parent process was created. If the cd command inherits the parent process' directory, then the objective of the command cd will never be achieved. Cd command in linux known as change directory command. Often, you may want to change the current working directory, so that you can access different subdirectories and files.

The home directory has a special character assigned to it---the ~ character. Use either absolute pathnames or local pathnames with the cd command. An absolute pathname starts at the root directory whereas a local pathname is relative to the current working directory. Where an absolute pathname starts from the root directory and leads to its destination, a relative pathname starts from the working directory. To do this, it uses a couple of special notations to represent relative positions in the file system tree.

An absolute pathname begins with the root directory and follows the tree branch by branch until the path to the desired directory or file is completed. For example, there is a directory on your system in which most programs are installed. This means from the root directory there is a directory called "usr" which contains a directory called "bin". To change the working directory we use the cd command.

To do this, we type cd followed by the pathname of the desired working directory. A pathname is the route we take along the branches of the tree to get to the directory we want. Pathnames can be specified two different ways;absolute pathnames or relative pathnames. Since the command line interface cannot provide graphic pictures of the file system structure, we must have a different way of representing it.

To do this, think of the file system tree as a maze, and that we are standing in it. At any given moment, we are located in a single directory. Inside that directory, we can see its files and the pathway to its parent directory and the pathways to the subdirectories of the directory in which we are standing. These two commands have the same effect, they both take us to the .hidden directory.

The first uses the absolute path, giving the full address from the home directory. The second uses a relative path, giving only the address from the working directory. By default, the ls commands lists the contents of the working directory (i.e. the directory you are in). You can always find the directory you are in using the pwd command. However, you can also give ls the names of other directories to view.

Navigate to your home directory if you are not already there. This file usually contains shell configuration settings. You may also see other files and directories beginning with .. These are usually files and directories that are used to configure different programs on your computer. Is used to prevent these configuration files from cluttering the terminal when a standard ls command is used.

Probably since the old shells didn't display the name of the current directory in the prompt, it was helpful to see the name of the directory when you typed cd -. For example when you type cd /usr/local you know that you are in /usr/loal, but when you type cd - you don't always remember from which directory you came from. In your home folder you will find a hidden file called .bashrc which contains some user configuration options. Changes made in this file will be actioned the next time a terminal is opened, since that is when the .bashrc file is read.

The contents of the user's desktop is in a directory here called Desktop, along with other files and folders. Which means the parent directory of the current working directory. It will simply express one level upper or parent directory. Print the current working directory with the pwd command. Pwd command is used in order to print current working directory.

Current working directory is the directory where the terminal currently running. In some cases listing or displaying current working directory will be usefull before changing directory. Depending on the situation, you probably don't want to and fortunately, there are command-line tools that make it extremely easy to create new directories and files. Are you tired of running multiple cd commands and ls commands while searching files and directories on your system? Cdir is a cool and easy-to-use command-line utility that provides a pleasant way to navigate the bash shell and search for files. On Unix-like operating systems, the cd command ("change directory") changes the shell's current working directory.

A relative path is a path that starts from the current working directory. For a path to be relative, it must start either with a dot and a slash (./) or nothing. Cd stands for "change directory" and is used to change the current working directory. The working directory is the one that you are currently interacting with. Every time you specify a command, you are using it within the working directory.

On a Linux system, the /home directory is a special directory reserved for a user's personal files, programs, and subfolders. When you log in to your system, the home directory is set as the current working directory by default. Before you can use the cd command to its full extent, you must know the difference between absolute and relative pathnames. The absolute pathname is the complete path to the directory, starting from the / folder. The current working directory is the directory or folder where you are currently working.

You can use the cd command to change the current working directory or move around the file system. To change to the current working directory's parent directory, type cd followed by a space and two periods and then press . To change to a directory specified by a path name, type cd followed by a space and the path name (e.g., cd /usr/local/lib) and then press . In Linux, both directories and files incur permissions.

Now we can see that we have changed the current working directory to/usr/bin and that it is full of files. As a convenience, it is usually set up to display the name of the working directory. Explore the options for ls to find out how to see hidden directories.

List the contents of the directory and identify the name of the text file in that directory. This allows us to move to our shell-lesson-data directory from anywhere on the filesystem (including from inside exercise-data). To find the absolute path we're looking for, we can use pwd and then extract the piece we need to move to shell-lesson-data. On many systems, the command line Desktop directory is the same as your GUI Desktop. Take a look at your Desktop to confirm that your output is accurate.

When you log into your server, you are typically dropped into your user account's home directory. A home directory is a directory set aside for your user to store files and create directories. It is the location in the filesystem where you have full dominion. There's also a directory called dev in the root directory of the filesystem.

Formula 1 Race Winners 2009

The European Grand Prix in Valencia provided the first win for Rubens Barrichello after Hamilton lost the lead with an error in the pits; he finished second while both Red Bulls failed to score. At the Belgian Grand Prix Giancarlo Fisichella gained Force India's first pole position, and his second-place finish behind Kimi Räikkönen gave their first points. Button's title charge was undermined by poor qualifying and a crash, involving him, Hamilton, Alguersuari and Grosjean, ending their races. Following the race Badoer, who had qualified and finished last in both races, was replaced with Giancarlo Fisichella after his performance at the Belgian race. Brawn returned to form in Italy, with Barrichello leading home the team's fourth 1–2 of the season. Lewis Hamilton crashed on the penultimate lap, but came back by winning the next race at Singapore.

Toyota teammate Glock was injured during qualifying, and a cracked vertebra meant he was replaced by reserve Kamui Kobayashi for the final two races. Dry conditions at Bahrain saw the Toyota team gain the front of the grid, but Button managed to fight up from a fourth-place start, and overtook race leader Timo Glock on his first pit stop. Hamilton and Räikkönen, in fourth and sixth respectively, gave their 2008 championship winning teams the best finishes of a disappointing season start. The Spanish Grand Prix was a battle between the Brawn teammates, with Barrichello getting ahead of polesitter Button while a first lap incident forced the retirement of four drivers. Button followed a different pit-stop strategy and passed Barrichello during his stop, leading Brawn's second one-two of the season. Red Bull was the closest team to Brawn finishing third and fourth, while Felipe Massa's fuel shortage lost him places as he slowed to finish the race.

Button won in dominant fashion at Monaco, leading the majority of the race from pole position ahead of his teammate Barrichello and Räikkönen, who scored Ferrari's first podium in 2009. At the Turkish Grand Prix Vettel started on pole but lost the position to Button on the first lap. Button went on to win, followed by Webber and a closely pursuing Vettel. Barrichello's car developed a gearbox problem, and incidents with Heikki Kovalainen and Adrian Sutil resulted in Brawn's first retirement of the season. By winning six out of the first seven races, Button had opened up a 26-point lead on his teammate, with Vettel a further six points behind.

Vettel followed his surprising 2010 title by dominating the 2011 F1 season. He clinched his second drivers' championship two months before the end of the season. Although less commanding in 2012, he nevertheless won five races to capture his third consecutive drivers' championship. Vettel's performance enabled Red Bull to win its second manufacturers' title in 2011 and its third in 2012. In 2013 he again ran roughshod over the F1 field, winning 10 of the first 16 series races to clinch his fourth consecutive title with a month remaining in the season.

That year he also became the first driver in F1 history to win eight consecutive races in a season, a record he extended to nine straight wins by the end of the year. Vettel's streak of drivers' championships ended with a fifth-place finish in 2014. Late in that season he announced that he was leaving the Red Bull team and joining Ferrari, beginning with the 2015 season. Vettel won four races and finished second in the world drivers' championship standings in his first season with Red Bull. In capturing the 2010 title, he became the third driver in F1 history to win the drivers' championship despite never being atop the championship standings until the final race of the season. He proved to have great talent and soon drew the attention of Gerhard Noack, a track owner who had shepherded Schumacher through his own youth-karting career.

Noack's support (as well as that of Red Bull Racing, which sponsored Vettel's karting career from age 12) helped Vettel win numerous karting titles before he switched to open-wheel racing in 2003. Vettel finished second in the overall standings in his first season of driving in the junior Formula BMW series and won the series championship handily in 2004, posting 18 victories in his 20 races. He subsequently moved to the Formula Three Euro Series and the World Series by Renault before making his Formula One race debut in 2007 after having served as an F1 test driver for two seasons.

The Drivers' and Constructors' championships were both decided at the penultimate race in Brazil. Storm-affected qualifying at Interlagos gave Barrichello pole during Formula One's longest qualifying session, while title rivals Button and Vettel started from 14th and 16th respectively. During the first lap, three incidents led to the retirement of three cars and a fire in the pit-lane, with Button taking advantage to move up the grid. Button fought up to fifth position by the race end, securing enough points to clinch the title. Mark Webber took the lead after Barrichello pitted and won the race, followed by Robert Kubica, to give BMW Sauber their joint best result of their final season and his only podium result in 2009. Lewis Hamilton completed the top three after starting 17th on the grid, moving him and McLaren above Kimi Räikkönen and Ferrari respectively in the championships.

Michael Schumacher, the living legend and the greatest Formula 1 driver, is the winner of 7 world championships for the year 1994, 1995, 2000, 2001, 2002, 2003 and 2004. Other than winning maximum championships, his other records include fastest laps and maximum number of races won during a single season. Schumacher, is the only F1 driver to have made history by finishing in the top three rank in every race of a season. Formula One official website quotes him as "statistically the greatest driver the sport has ever seen".

Formula One is the highest class of open-wheeled motor racing defined by the Fédération Internationale de l'Automobile , motorsport's world governing body. The "formula" in the name refers to a set of rules to which all participants and cars must conform. The F1 World Championship season consists of a series of races, known as Grands Prix, held usually on purpose-built circuits, and in a few cases on closed city streets. Each winner is presented with a trophy and the results of each race are combined to determine two annual Championships, one for drivers and one for constructors.

The World Championship for Drivers is held since 1950, after the Formula One standard was agreed upon in 1946. The Constructors' Championship was added for the 1958 season and has been awarded ever since. Here, you will find the Formula 1 records for most championships race wins, pole positions, race entries for both teams and individuals. If you want to know more about the youngest drivers to win championships, races, points and podiums, read our article here. They were front engined, with narrow-treaded tyres and 1.5 litre supercharged or 4.5 litre normally aspirated engines. When Formula One regulations returned in 1954 engines were limited to 2.5 litres.

Mercedes Benz made major developments until they withdrew from all motor sports in the aftermath of the 1955 disaster at Le Mans. In the late 1950s Cooper introduced a rear-engined car and by 1961 all manufacturers were running them. As an added incentive for the teams, a constructors' championship was introduced in 1958. The season opened at the Australian Grand Prix, won by Jenson Button with teammate Rubens Barrichello in second, giving the team a 1–2 on its début. Red Bull's Sebastian Vettel had been running in second until he collided with BMW Sauber's Robert Kubica.

The accident meant the race finished behind the safety car, with Toyota's Jarno Trulli eventually classified third despite McLaren's false protest he had illegally overtaken Lewis Hamilton. Reigning champion Hamilton was disqualified from the Australian race for lying to the stewards and at the following Malaysian Grand Prix there were reports he was on the verge of quitting. The race was equally dramatic, being stopped because of monsoon-like conditions, meaning only half points were awarded for only the fifth time in F1 history. Button mastered the changing conditions for his second win, while quick starting Nico Rosberg dropped to eighth when the race was stopped.

In the interval between races, the controversial double diffusers, used by Brawn, Williams and Toyota, were declared legal by the FIA, ending the fight over their use. The Chinese race also took place in wet conditions, with the rain throughout the duration of the race necessitating a safety car start and causing several accidents. Vettel led teammate Mark Webber to Red Bull's first win in Formula One, ahead of the two Brawns and McLarens. The British Grand Prix was seen as a turning point, being dominated by Red Bull with Vettel leading home Webber, in dry conditions.

Button was not on the podium for the first time this season, finishing sixth. Red Bull also dominated the following German Grand Prix with Webber taking his first pole and race win, despite being given a drive through penalty. Ferrari were also showing signs of improvement, Felipe Massa finishing third in what would be his final race of the season.

He was hospitalised after being hit on the helmet by a flying spring when he was travelling at 162 mph in qualifying for the Hungarian Grand Prix. The accident overshadowed the race, with a lightly-fueled Fernando Alonso on pole retiring early in the race, which was won by Lewis Hamilton. Jaime Alguersuari finished his début race ahead of Buemi, the Toro Rosso test driver replacing the fired Sébastien Bourdais. Post-race, the Renault team received a suspension for the European Grand Prix, for an incident where Alonso's tyre came loose on the race track following a pit-stop error. An appeal overturned the decision, and the team raced in Valencia.

The first multi-team testing session took place at Circuit de Catalunya, Barcelona in November 2008, two weeks after the end of previous season. All teams, except Toyota, took part in the testing session where some teams tested their new aerodynamics package and slick tyres. The new look cars did not suit everyone's taste, with BMW Sauber's test driver, Christian Klien, labelling the car the ugliest car he'd ever seen. On 9 March, testing at Barcelona featured for the first time Brawn GP, who made an immediate impact by leading the times early in the day. The test, the first in which all teams used their 2009 cars, had BMW Sauber leading the times while Brawn GP finished fourth.

On day three, Brawn GP's Jenson Button was fastest by just over one second to Ferrari's Felipe Massa, while Button's teammate Rubens Barrichello went even faster the next day. At the other end of the timing sheets, reigning champion Lewis Hamilton's McLaren team were struggling to adapt to the new regulations, often 1.5 seconds off the pace. An era of British dominance was ushered in by Mike Hawthorn's championship win in 1958, although Stirling Moss had been at the forefront of the sport without ever securing the world title. Although the aerodynamically flawed McLaren MP4-24 would be vastly improved by a mid-season update, Brawn and Button won the respective 2009 constructors' and drivers' world championships. World champion John Surtees drove for the team in 1967 and scored a memorable victory at the Italian Grand Prix - winning with the new RA300 in its first race. The team withdrew from motor racing after the 1968 season, to concentrate their energies on developing new road cars, having cemented the Honda name in the motorsport hall of fame.

The Brawn team, formed as a result of a management buyout of the Honda team, won six of the first seven races, their ability to make the most of the new regulations being a deciding factor in the championship. Red Bull Racing caught up in an unpredictable second half of the season, with the season being the first time since 2005 that all participating teams had scored World Championship points. Sebastian Vettel and Button's teammate Rubens Barrichello were his main challengers over the season, winning six races between them to finish in second and third, respectively.

Jenson Button and Brawn GP secured the Drivers' Championship and Constructors' Championship titles, respectively, in the Brazilian Grand Prix, the penultimate race of the season. It was both Button and Brawn's first championship success, Brawn becoming the first team to win the Constructors' Championship in their debut season. Also notable was the success of Red Bull Racing, as well as the poor performance of McLaren and Ferrari compared to the previous season. Nine wins and 13 pole positions in five seasons followed but Webber could never quite match the sister car of Sebastian Vettel.

2010 was by far his best chance as he led Fernando Alonso and Sebastian Vettel by 14 points after 16 of 19 rounds. Probably the toughest of this list and one of the hardest working, too, Webber was a fine driver, especially in qualifying and when up against it, but fell just short of the greatest prize in F1. His first year at Ferrari has been even more impressive, taking seven pole positions and winning two races, including his team's first home victory since 2010. Not only has he been quick, he has unsettled and is likely to beat four-time Vettel this season, announcing himself as the next big hope of F1.

Again, the small sample says means his statistics in our model are a little unrepresentative, like Hakkinen's, but his place in this list is fully deserved even after just 41 Grands Prix. A fine second year was enough for him to join McLaren but just as they started their slump. His one season there has been followed by seven very successful years at Force India/Racing Point, where he has cemented his reputation as one of the best drivers outside of the top teams. From 2014 to 2018 he never finished outside the top 10 in the championship and scored a total of 400 points over five seasons with five podiums. To limit the effect a drivers' machinery has on the rating we "weighted" the points and race wins to come up with an adjusted total.

This has been done by looking at how competitive the drivers' cars were during each season. For example, if a driver wins in a race in a car that came fourth in the championship, that win should be worth more than a win from a driver whose team dominated a season. The younger Piquet was fired midway through this year's 17-race schedule of races in Europe, Asia, the Middle East and South America. The 2008 Singapore race came near the end of his first season in Formula One. At the time he was under heavy pressure after a series of lackluster performances and an inability to match the speed of his teammate, Fernando Alonso, the winner of two Formula One championships with Renault. A lunge by Senna into the final chicane ended in disaster as Prost turned in and took the pair seemingly out of the race.

Knowing that this gave Prost the title, Senna urged marshalls to start his car again and he fired away up the escape road up after the remaining drivers. Despite pitting for a new nose cone, miraculously he fought back to take victory. But while Senna was fighting out on track, Prost was fighting in the officials office, claiming that Senna had cut a section of the track.

The decision almost led to Senna walking away from Formula 1 altogether, but thankfully it only led to the separation of the pair as Prost left for Ferrari. The 1965 Italian Grand Prix at Monza is thought to have seen the most overtakes for the lead of any F1 championship race in history, with first place changing hands a whopping 41 times over the 76-lap event. According to tyre supplier Pirelli there were 147 overtakes at the 2012 season finale at the Brazilian Grand Prix, the most of any rain-affected race.

With the Spaniard finishing second behind McLaren's Jenson Button, sixth place was enough to hand Vettel his third consecutive crown, topping the standings by just three points. In Q3 , the last ten drivers contest for the best place on the starting grid. The driver with the fastest lap time is awarded the pole position on the starting grid. The remaining drivers are ranked according to their fastest lap times and will take their designated places at the start of the race. Once entering F1 in 1973, Hunt's first few seasons were a bit rocky. Making his debut with Hesketh racing, an aristocrat-owned, 'just-for-fun' team, Hunt led the team to some surprising results and even finished fourth in the 1975 drivers' championship.

After putting his Ferrari on pole, earning the fastest lap, and winning his first race for the team in Australia, Räikkönen was already keeping up with Ferrari's reputation for dominance at the time. 2007 progressed to see Räikkönen crowned world champion in Brazil, despite entering the final race in third place in the standings with the top three separated by just a single point. The teams were less successful in their attempts to have the long-running French and Canadian Grands Prix kept on the calendar, with the organisers of both events pulling out due to financial issues. The Abu Dhabi Grand Prix made its début appearance as the last round of the season, at the Hermann Tilke-designed Yas Marina Circuit.

The race, starting at sunset, was Formula One's first day-night race. Whatever you make of his career decisions, Alonso is arguably the driver who got the most from their car. But winning the 2010 championship in a sub-standard Ferrari would have been perhaps his greatest achievement. Perhaps his talent stands out so much because of its partly unfulfilled nature. Just as there are drivers who fail to break into the very top level, Alonso failed to do his talent full justice – two world championships and 32 race wins is a relatively poor return. With two world titles and plenty of success in the mid-2000s, Alonso was always going to rank very highly.

No driver has a bigger increase in weighted wins, moving from 32 wins in reality to 38.5 in the model. Nobody has a better record against their team-mate either and over such a long period, too. The Spaniard beat the sister car in 16 of his 17 seasons – or 95 per cent of the time.

Raikkonen should not only be remembered as the driver who played second fiddle to Sebastian Vettel at Ferrari, taking just one win in his five-season return to the team. Even back in the midfield at his old, rebranded Sauber team he has shown how much of an asset he still is as a driver. Over the course of 17-and-a-bit seasons in F1, Button's career was either feast or famine. Simply, he either finished in the top 10 of the championship or no higher than 15th . Button, like Raikkonen, perhaps falls just outside that list of the undeniable all-time greats who have raced in the 21stcentury.

He was, though, remarkably consistent and if the car was to his liking unbeatable. Barrichello then suffered further disappointment with a puncture in the closing laps, being forced into the pits and rejoining in eighth. Prost, who won 51 times in his career, won a career-high seven times in both 1984 and 1988 with McLaren. Both of those seasons, he finished second in the championship to teammates—Niki Lauda in 1984 and Ayrton Senna in 1988. The 2005 US Grand Prix at Indianapolis is infamous for only having six cars contest the race. The entire field bar Ferrari, Jordan and Minardi withdrew from the race at the end of the formation lap after a political fallout caused by a series of Michelin tyre failures in practice.