Hello,
Working on a project for on-prem CUCM and there is a need for E1 and FXS interfaces, for that I'll use an ISR 4321 with the necessary NIMs but in term of licensing what exactly does this device need to have to work properly?
Does it need UC, SEC, CUBE?
I know current A-FLEX-3 licensing gives me SRST licenses already but I'm really unsure if something else is needed.
Thanks!!
