With Communications Manager 5.X and later, you need to have Device License Units [a license file] uploaded on the UCM server.
That's the reason why you have been asked this question since each device on UCM server needs certain number of DLUs.
To answer your query, IP Communicator needs 3 DLUs. If you are configuring IP Communicatior as an Adjunct device, meaning hardphoe as primary device and IP communicator associated with this hardphone as a secondary phone then you need only 1 DLU per communicator.
There is no licensing enforcement in 4.X and no concept of DLUs, so the calculator is only for UC Mgr. 5.0 and later. In 4.X and below you would need to order the appropriate software license per phone - SW-CCM-UL-XXXX (SW-CCM-UL-7911, SW-CCM-UL-7975, etc.)
BTW - great calculator! I'm not sure why the ATA would cost 3 DLUs in 5.1 though. The intent was one DLU per port.
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The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...