Integration and Installation of the CMS Electronics system

The electronics systems used to control, trigger, and acquire data from the four experiments at LHC are, for the field of High Energy Physics, of unprecedented level of complexity and sophistication. In the case of CMS, the users are gaining access to the underground counting room (USC55) at a late stage with respect to the official LHC start-up date. Measures taken to reduce the time required between when the access is granted for installation and the experiment is ready for physics are presented along with the current status and plans.