diff --git a/md/install-zint.md b/md/install-zint.md
index f1a9001..de008b1 100644
--- a/md/install-zint.md
+++ b/md/install-zint.md
@@ -12,3 +12,5 @@ cmake ..
 make
 make install
 ```
+
+https://gist.github.com/anthonyaxenov/0ca957e4aab7bae3636746dc696346ec
diff --git a/php/AMI.php b/php/AMI.php
new file mode 100644
index 0000000..8eae8d9
--- /dev/null
+++ b/php/AMI.php
@@ -0,0 +1,158 @@
+<?php
+
+/**
+ * Класс для работы с Asterisk по протоколу AMI через сокет.
+ * Реализовано: подключение, авторизация, отправка команд, отправка СМС, отключение.
+ * Успешно работало на проде в связке с Yeastar TG400.
+ *
+ * Class to work with Asterisk gateway throuth AMI protocol via socket.
+ * Features: connection, authorization, send commands, send SMS, disconnect.
+ * Successfully used in production with Yeastar TG400.
+ *
+ * @see https://habr.com/post/253387/
+ * @see https://gist.github.com/anthonyaxenov/12cff2bea5fae1f1c5b40b886340b2ba
+ */
+class AMI {
+
+    /** string Параметры подключения к Asterisk. Asterisk config.  */
+    private const AMI_HOST = '192.168.1.19';
+    private const AMI_PORT = 5038;
+    private const AMI_USER = 'user';
+    private const AMI_PASS = 'useruser';
+
+    /** int Код последней операции. Last action ID. */
+    public $lastActionID = 0;
+
+    /** array Массив строк результата последней операции. Array of strings with result of last action. */
+    public $lastRead = [];
+
+    /** resource Подключение к сокету. Connection socket. */
+    private $connection;
+
+    /** array Описывает данные о последней СМС. Describes last SMS data. */
+    private $sms_data = [];
+
+    /**
+     * AMI constructor.
+     */
+    function __construct() {
+        $this->connect();
+    }
+
+    /**
+     * Соединяет со шлюзом.
+     * Connects with gateway.
+     *
+     * @return bool
+     */
+    public function connect() {
+        $this->connection = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
+        if ($this->connection === FALSE) {
+            echo "Cannot socket_create(): ".socket_strerror(socket_last_error())."\n";
+            return FALSE;
+        }
+        if (socket_connect($this->connection, self::AMI_HOST, self::AMI_PORT) === FALSE) {
+            echo "Cannot socket_connect(): ".socket_strerror(socket_last_error())."\n";
+            return FALSE;
+        }
+        return TRUE;
+    }
+
+    /**
+     * Авторизирует на шлюзе.
+     * Authorizes on gateway.
+     *
+     * @return bool
+     */
+    public function auth(): bool {
+        $command = [
+            "Action: Login",
+            "Username: ".self::AMI_USER,
+            "Secret: ".self::AMI_PASS,
+        ];
+        $this->command($command);
+        return $this->lastRead["Response"] === "Success";
+    }
+
+    /**
+     * Пишет данные в сокет.
+     * Writes data into socket.
+     *
+     * @param array $command
+     * @return int
+     */
+    public function write(array $command): int {
+        $this->lastActionID = rand(10000000000000000, 99999999900000000);
+        $string = implode("\r\n", $command);
+        socket_write($this->connection, "ActionID: {$this->lastActionID}\r\n{$string}\r\n\r\n");
+        return $this->lastActionID;
+    }
+
+    /**
+     * Читает данные из сокета.
+     * Reads data from socket.
+     *
+     * @return array
+     */
+    public function read(): array {
+        $result = [];
+        $data = socket_read($this->connection, 1024);
+        $data = str_replace("Asterisk Call Manager/1.1\r\n", '', $data);
+        $data = explode("\r\n", trim($data));
+        foreach ($data as $key => $string) {
+            $pos = strpos($string, ':');
+            $key = substr($string, 0, $pos);
+            $string = substr($string, $pos + 2, strlen($string));
+            $result[$key] = $string;
+        }
+        return $this->lastRead = $result;
+    }
+
+    /**
+     * Отправляет команду шлюзу и возвращает ответ.
+     * Sends command throuth socket and returns response.
+     *
+     * @param array $command
+     * @return array
+     */
+    public function command(array $command): array {
+        $this->write($command);
+        return $this->read();
+    }
+
+    /**
+     * Отправляет СМС.
+     * Sends SMS.
+     *
+     * @param string $phone_number
+     * @param string $sms_text
+     * @param int    $sim_id
+     * @return int SMS ID
+     */
+    public function sendSMS(int $dispatch_id, string $phone_number, string $sms_text, int $sim_id): int {
+        $this->sms_data['sim_id'] = $sim_id;
+        $this->sms_data['phone_number'] = $phone_number;
+        $this->sms_data['text'] = $sms_text;
+        $this->sms_data['date_send'] = date('Y-m-d H:i:s');
+        // $this->sms_data['date_status'] = "NULL";
+        $this->sms_data['status'] = 0;
+        $smsid = $this->writeSmsReport();
+        $command = [
+            "Action: smscommand",
+            "command: gsm send sms ".($sim_id + 1)." {$phone_number} \"".urlencode($sms_text)."\" ID{$smsid}",
+        ];
+        $this->command($command);
+        return $smsid;
+    }
+
+    /**
+     * Отключает от шлюза и закрывает сокет.
+     * Disconnects from gateway and closes socket.
+     */
+    public function disconnect() {
+        if ($this->connection) {
+            $this->write(["Action: Logoff"]);
+            socket_close($this->connection);
+        }
+    }
+}
diff --git a/php/DiskSpace.php b/php/DiskSpace.php
index c03abf3..c800459 100644
--- a/php/DiskSpace.php
+++ b/php/DiskSpace.php
@@ -3,7 +3,8 @@
  * Простой класс для получения данных о пространстве на диске, разделе, в директории
  * Может работать некорректно на shared-хостингах и при попытке получить данные
  * о корневом разделе.
- * https://gist.github.com/anthonyaxenov/5db7be8b514f30ab2658150f2c018740
+ *
+ * @see https://gist.github.com/anthonyaxenov/5db7be8b514f30ab2658150f2c018740
  */
 class DiskSpace
 {
diff --git a/php/is-cli.php b/php/is-cli.php
index ef8012c..a90b99a 100644
--- a/php/is-cli.php
+++ b/php/is-cli.php
@@ -4,6 +4,7 @@
  * Checks if script running under php-cli
  *
  * @return bool
+ * @see https://gist.github.com/anthonyaxenov/c1b237af14ec91aead19be66cdfc29e3
  */
 function is_cli(): bool
 {