I have a router cisco2821-sec/k9 and I want to install the CCME (Cisco Call Manager Express) with 40 users license
What is the reference (to purchase) of the CCME software with 40 users license for the router cisco2821-sec/k9
The IP phone CP-521SG and CP-524SG can operate with a CCME installed on the Cisco 2821?
If not what kinds of the most cheap cisco IP phone can operate with a CCME installed on the Cisco 2821 router
Thank you in advance