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Pre-Planning Understand Limitation of CUCM: Note: Licensing till CUCM 11.5 is done on PLM but CUCM 12.5 will use smart licensing. Recommended plan: Migration from CUCM using 8.5 to 12.5 But here we will discuss where a method is supported which does not involve hierarchy upgrades. To get back to pace, everyone must plan for upgradation to a stable version which is (n-1), where n is the latest version.įor most migrations, you need to plan a hierarchy upgrade to reach 12.5. Most of the environments are still running on 8.5 which is EOL and EOS (End of Service). In this article, we will discuss how the approach should be. CUCM Upgradation and Migration takes an ample amount of planning and prerequisites check before actual migration and post-migration.
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