our company is planning to upgrade Cisco Call manager 5.0 to version 8. Can you please help me out what the procedure will be. Or also what the steps i need to follow to upgrade from 5 to 8.
For upgrading call manager from version 5 to 8 , u need to consider the following steps:
a. you need to have valid ESW and UCSS contract since this would be a major upgrade.
b. Check for existing Hardware since DRAM and HDD requirements are different for version 8.0(3) and above.
c. you also need to check the software compatibility matrix.
In addition to good answer from Aman (+5), please follow the upgrade guide which details all the necessary steps:
You can also search this forum for similar threads as this is quite often asked.