Multi Circuit Services

Hello,
I am looking for a dimensioning methodology for multiservice circuit switch.
For example, I want a multiservice network with average circuit traffic of:
voice (12kbps)= 10E
LCD64 (64kbps) = 2E
and LCD384 (384kbps)= 1E

To do that, do I need Kaufman algorithm or is there anything more simple (by using specific Erlang B tables)????

Thank for all answers.