Mínimum criteria in deprivation of liberty of the calls made by the inmates, or making the rules for visits and telephone contacts more flexible when possible. 214. Upon entering a centre, inmates must be provided with oral and written information on the features of the centre and their rights and duties, including the possibility of requesting habeas corpus where legally appropriate. Such information should be furnished in a manner that is clear and easy to understand, available in various languages, visible in a place where it may be frequently consulted and inmates should be allowed to keep a copy. In addition, CP should have a simultaneous translation system in those cases where this is necessary. 215. The food at CP should be of adequate quality and served in a sufficient quantity. The distribution of meals should be organised in a manner such that it is served at optimum temperature. 216. The video-surveillance systems at CP should be extended for them to cover permanently all departments in which inmates reside, except for the interior of toilets and cells, and recording protocols should be put in place in line with the aforementioned criterion. Video-surveillance system at the CP of Topas (Salamanca) 217. In addition, CP without them should install inter-phones or sound calling systems in cells for inmates to be able to report any incident to the officers. 218. At some CP the fire safety measures should be improved, its being desirable for all of them to have fume detectors within the cells. 219. The use of video-conference systems should be encouraged permitting communication between the CP and the courts, to avoid unnecessary trips and movements of inmates for certain procedural matters, with the consequence damage 83