MFC R2 little help

Hello, I have been working using asterisk with MFC-R2 support in small business, let´s say 50 o 60 calls on simultaneous. I have now trying to work with asterisk with MFC-R2 but the diference is that i will have arround 1000 in simultaneous calls. If anybody has experience with these i would really like to get your opinion. I am trying to get some comments about people experience. And i would also like to know if anybody knows about performacnce and computer processors needed in order to manage the 1000 calls.

thanks in advance,
Hernan Danielan