The C2901-CME-SRST/K9 is a Cisco 2901 router that comes with a Voice Bundle including PVDM3-16, FL-CME-SRST-25, and UC License PAK for enhanced communication.
The C2921-CME-SRST/K9 is a robust Cisco 2921 router that comes with a Voice Bundle, featuring PVDM3-16, FL-CME-SRST-25, and UC License PAK for enhanced communication capabilities.