when we buy Cisco 2821 router does it come with CallManagerExpress software included CME or we have to buy it aside
and is it enough if we have it to run a small ip telephony solution for 30 ip phone(7911 for example) or we need to buy and Integrated Service Engine Card
Is this its exact name or has other name?
i.e. to create a small ip telephony solution i need to have exaclty what
only the Cisco 2821 router or buy additional modular cards