Collaboration homelab question

[Brandon_Snopek]

Hello, 

New to the community here and have a question.  I have a route and switch home lab that I want to start adding some collaboration function to for studying the ccna collaboration exam.  I currently have it up and running and working as my home connection to the internet. The design  consists of

cable modem -> isr 2911 -> asa 5510 -> 2921 -> c3750.

I have pvdm3-64 cards in the 2921 router but nothing in the 2911 and no uc license on either router.  My question is do I need to have pvdm cards in both routers and UC licenses for each router to be able to use this setup to build a collaboration home lab or do I just need the UC license for the 2921 which already has the pvdm3-64 installed in it.  Also if I do need the uc license in both routers is there any other basic licensing I will need to access the voice commands and would I need an additional pvdm for the other router.

Thanks,

Brandon

[Jaime Valencia]

That depends on what you want to do.

PVDMs are used for TDM termination and/or conferencing/transcoding.

Same for the UC license, if you want a single CME then you need it only in one ISR, if you want two CMEs and to place calls from one to the other, then you need both licensed.

[Brandon_Snopek]

Thanks for the reply. I was only going to do once location but I also wanted to play around with setting up a sip trunk on the device as well. Other than that it will be a single location and if I do any multiple location tests I can try and integrate gns3 into my lab as I've seen people do.  Would this still require just one router, one pvdm and one copy of cucm? Or would I need other software?