The CCIE Voice Blueprint indicates that the 6503 uses "Switch OS version 7.6x"
Since the current version of IOS is 12.4, is this really accurate?
Im trying to focus my studies and want to focus on the correct Supe with the correct IOS
The 6500 on the LAB uses CATOS not IOS, so this explains the versioning error. use 7.6x of CATOS and you'll be good.
HTH, please rate useful posts.