The Purpose Of This Plec Is The Contracting Of The Maintenance Service Of The Communications And Associated Elements, Managed By The Computer Unit Of The Vall D'Hebron University Hospital Foundation - Research Institute (Vhir), In Accordance With The Technical Prescriptions That Are Articulated In This Document. The Purpose Of The Service Is To Guarantee The Continuity And Durability Of These Equipment, By Performing The Corrective And Preventive Operations That Are Necessary, And Always In Accordance With Criteria Of Technical Quality, Efficiency And Economic Rationality.