I have a CUCM 5.1(x) running on production servers (older MCS). I want to migrate it to version 7.1(x) on a new server platform MCS-7825-i4-k9. Upgrade on existing MCS (older one) to version 7.1(x) is not supported Installation neither is 5.1(x) on this new MCS-7825-i4-k9 platform. Any one had this problem before ??