IP Telephony and Phones

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1. I have Cisco CallManager 3.3 and I want to upgrade it (with new server, of course) to 8.5. Can I purchase MIG-CUCM-USR licenses or I need to buy new ones?2. We are thinking also in migrating the platform to CUCM Express. Do I need to buy then CCM ...

Hi Folks, Yes I know tha the serial port of server was there to connect to a 3rd part voicemail system (not that I ever saw one) but what if I need to use it for something else - can it be done? I may well have a requirement for users to initiate sen...