one either by physically checking all sites or centrally from the network operating centre. Counting on their operating lives and remaining periods it is possible to monitor battery health. New hardware units can replace old or outdated hardware versions, especially when these retrofits are necessary for enhancing the performance or launching new features. In addition, constant effort need to take place to reduce the level of alarms Roll-Out Network Project Management Preparations & Prerequisite Requirements Safecopy of the current package Extract the new SW package Hardware Management System SW UPDATE Check preconditions Saving the Configuration from Running Package Check Locked Files Check Active Alarms Check Command Calendar Jobs Stop NE & RNW Measurements Running the Upgrade macro Connect to Equipment Check Macro Start Information SW Verification Unzip SW Package Upgrade existing package File Conversions Database Conversions Copy Temporary directory Preparing new Package Create New Package Install Correction Deliveries Boot Prom Update Check Network & Database state Save Unit State condition New SW Activation Loading New Package to all Units Change New Package status to Default Network Element Management Unit SW Update Delete temporary files used during upgrade Safecopy of New package Checking of system configuration Figure A.11 Software upgrade process (NE, network element; RNW, radio network) that are found on the system, SO that the load on the system is reduced and chances of complete failure are kept to minimum levels, ensuring a high level of system stability at all times. On-site visits can be arranged to check the sealing of equipment sites, condition of cables and orientation of antennas with regard to wind loading and twisting. All equipment sites should be checked for dust and humidity. HVAC units need to be serviced as per their service schedules and their automatic switchover and cutover mechanisms have to be checked for effective functionality. Regular maintenance of diesel generators is require