problems that require a large budgetary commitment or a commitment of personnel for their elimination.  The police stations must be hygienic, well-kept and equipped with functioning heating systems. 2.6.8 Call bells in detention rooms that can be switched off During a visit to the Lehen police station, the commission found that the call bell in a detention room had been deactivated. Under the Code of Conduct for Detention, inmate cells are to be equipped with suitable facilities for contacting the guards. This requirement is generally satisfied by installing a call bell system.   The NPM finds it completely understandable that certain retractable persons can seriously disrupt operations by continuously utilising the call bell system. However, the ability to switch off the call bell system is problematic from a human rights perspective because incarcerated persons will then have no ability to contact the guards. If the bell is switched off, there can be no response to the needs of the prisoners and to any emergency situations, particularly – as in this specific case – if the guards forget to (re-)activate the call bell system. Contacting the guards Therefore, the solution to this problem is not to switch the call bell system off and thereby circumvent the provisions of law. In general, the call bell in a detention room should always be activated and acoustically audible. Under CPT standards (p. 16, margin no. 48), persons in police custody must always be able to contact the guards.   In agreement with the Federal Ministry of the Interior, the police department of Salzburg stated that no call bells capable of being switched off will be installed in the future and that the call bells currently in use will be gradually removed. This will guarantee that it will be technically impossible to switch call bells off in the future. If deactivation is still possible during the transitional period, the call bells must remain activated at all times. Deactivation no longer possible in the future  A permanently activated call bell system must be provided so that persons in police custody can always contact the guards.   2.6.9 Voluntary stay in a locked room During a visit to the Bad Ischl police station, the commission determined that a person was offered the option of resting in a detention room between two interrogations. During this period of time, 134