I currently have a Cisco 2821 that is terminating 3 T1 lines for my Cisco Conference Bridge. I was not around when this was configured and was tasked with replacing it with a new Cisco router since the 2821 will be EOL in October. What do I need to verify that the new router has to make sure that I have a successful conversion. I was looking at the Cisco ISR 4351 with the UC Bundle and a 4 port T1 NIM card with Cisco 4 gen 64 channel PVDM card to place on the T1 card. Will I need one on the motherboard as well? Thank you for your assistance in advance.
