SQLSTATE[IM002] Data source name not found and no default driver specified

try {

    $connection = new PDO("odbc:Provider=Teradata;DBCName=Tera;Database=DBC;Uid=dbc;Pwd=dbc;");
    /* also tried */
    // $connection = new PDO("odbc:Driver={Teradata Database ODBC Driver 16.10};Server=192.168.1.40;Database=DBC;User=dbc;Password=dbc;");

} catch (PDOException $e) {

    die('Failed to connect '. $e->getMessage());
}