Currently we have PBX system build with CentOS 5.8 and Asterisk 1.8 on HP ProLiant DL380 G7 server. It has two Intel Xeon E5649’s (2.53GHz, 6-core with Hyper Treading), 8 Gigs of RAM and two 10000 RPM 300 GB hard disk drives in RAID 1. Phone network also includes around 150 phones. All calls are being recorded. I spot PBX peaking at 73 concurrent calls without a problem.
So the business is growing and I have a question. What hardware requirements would be to the system in two cases: 300 phones and 150 concurrent (recorded) calls; 600 phones and 250 concurrent (recorded) calls.
Thanks for any advise.