... and a CUCM instance in a cloud can communicate with each other without any complications. This architecture helps to perform internal calls in the corporate environment where the CUCM instance is deployed.
Unsupported phones
Planning to upgrade to CUCM 12? Note that the following phones won’t be supported since 12.0:
7905
7970G
7921G
7935
7902
7910
30 VIP
12 SP+
7912
7920
7971G-GE
7910SW
New Licensing Technologies
CUCM 12 doesn’t support ...
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