Servers for start VOIP - please for help

Hello. I will start VOIP services from next month. I don’t know what is better - buy new or used servers. I found CompaQ Proliant ML 570 (4xPIII XEON Processors with 3GB ECC SDRAM) in good prize and I don’t know how many connections will be work with that in the same time. If you have any ideas for servers please to help me. Thank’s.

When I did some testing on 1.2.7 there where no enhancement in SMP machines.

There where a better performance on AMD Opteron than on Intel Xeon.

So I recommend DL-145 as your asterisk frontend.