what's happen if there are too many RFC callls?

Hi,

I want connect an CRM with an External Server.

What happen if I have X numbers of RFC Servers, running as threads and I

want make X+2 connections to an External Server.

I just know that when I start the threads, every thread loggs into the CRM

as an Client, but I don' know how it's going to handle too many requests.

Thanks in advance,

Iwan