The invention describes a method for controlling access in a telecommunication system comprising a first transmitter-receiver unit, a second transmitter-receiver unit and a remote-controllable server. The web page includes a first locator for first content. The nut is threaded onto the external threaded part in a threaded state in which the pipe and the sleeve are inserted through the joining hole. For example, the data storage device may be configured into a manufacturing test procedure mode, and then into a customer specific operating mode. The tube is openable without breaking into pieces, and remains intact at the injection temperature. In one embodiment of the present invention, the forming of the barrier layer comprises the steps of forming a metal layer in the hole, and performing a treating process in an atmosphere including a plasma formed from a gas including oxidant to form a metal oxide layer on the metal layer.