We are trying to upgrade a MCS 7800 running CUCM 6.0.1 to CUCM 6.1.2. I did some research and found that it can directly upgrade, but the upgrade file is so big it is in two parts. We have tried this command:
cat UCSInstall_UCOS_18.104.22.1680-13.sgn.iso_part1of2 UCSInstall_UCOS_22.214.171.1240-13.sgn.iso_part2of2 > UCSInstall_UCOS_126.96.36.1990-13.sgn.iso
But it say "<" invalid anyone else has this problem ?