Cisco VCS Expressway questions

[PaulKim44009]

I do have a question about "Cisco VCS Expressway L-VCS-EPM-100V2S VCS EPM - 100k Subscriber Pak"

What is the '100k Subscriber Pak' mean?

Is this mean 100 endpoints able to join VTC connection?

Need to clarify subscriber Pak mean?

Thanks for your support in advance.

Thanks.