What is the difference between the different licenses?
Basic
Enhanced
Essential
Do different phone models require different licenses? What about analog phones (vg224)?
Refer to the below document, it has a table describing/comparing the different types of UCL licenses on page 2:
https://www.cisco.com/c/dam/en/us/products/collateral/unified-communications/unified-communications-licensing/C45_523902_11_9_licensing_aag_v5a_1.pdf
Yes some base models need only essential (3905 for example) and basic (7811 for example) licenses. Analog VG224 will need the essential license per port as mentioned in the above document.
-Terry
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Hi,
In addition to the nice info shared by Terry please be careful about important license usage recommendations related to extension mobility & owner user id association as explained in the following doc
http://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/117600-technote-cucm-00.html
HTH
Manish