Phone System -- 3CX server specs

I already have been testing and have a local 3CX reseller, but want some more Windows 2012 server specs.

What recommends do you have for 32 simultaneous calls on a DELL server, without Hyper-V, that is only RUNNING your software ?
1.      MEMORY  better to have two 8GB RDIMM sticks or one 16GB RDIMM stick ?
2.      # of PROCESSORS  how many ?
3.      # of CORES per PROCESSOR  how many CORES per processor ?
4.      PROCESSOR SPEC  Is Intel® Xeon® E5-2403 v2 1.80GHz, 10M Cache, 6.4GT/s QPI, No Turbo, 4C, 80W, Max Mem 1333MHz OK ?
5.      RAID  OK with software RAID, or do you recommend hardware RAID ?
6.      HARD DRIVES  better to have two 7.2K RPM hard drives or one 15K RPM hard drive for VoiceMail saving/etc ?
7.      TAPE DRIVE  any recommendation for each backup/restore to another server if this server crashes ?  it is as easy as just restoring onto the same make/model machine or do I need to re-register/etc ?  basically if something happens to the PBX I need to recover in under 30 minutes
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These links should help you work out what you need:

Server vendor choice is probably the easiest one to make. Dell, HP, and Lenovo (formerly IBM) are all well-known reputable manufacturers, and there are others too, although having a much smaller share of the market. Comparing their offerings will help you to make an informed decision on what fits your needs best.

Asking, "What's the best server?" is like asking, "What's the best car?" The answer is invariably, "It all depends..." Hardware recommendations on EE can be quite partisan, with supporters and detractors in equal measure for every vendor, but there is also good advice to be had, especially from those experts who have worked with a wide variety of hardware.

Regarding software RAID vs hardware RAID, for RAID1 configurations I'd recommend software RAID as it's cheap and efficient with very little system overhead.

If you want redundancy for your voicemail volume then you'll need two disks as a minimum for a RAID1 array.

Regarding backup, I prefer disk-based backup to tape-based backup as I find the former faster, more reliable, and cheaper in terms of hardware. I'd also recommend the use of imaging backup software as restores are a lot easier and quicker when using images. Products such as Storagecraft's ShadowProtect for Windows Server have worked well for me, and their HSR feature, described here:

... can save a lot of time when restoring an image. However, there will doubtless be other recommendations of equal merit, so go with whatever suits you best.

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Tony GiangrecoCommented:
Here is what I recommend:

1.  Two 8GB RDIMM sticks

2.  Two processors

3.  4 CORES per PROCESSOR or 6 if you have the budget

4.  Speed is slow, but for a phone system tjhis should be ok with two processors: Intel® Xeon® E5-2403 v2 1.80GHz, 10M Cache, 6.4GT/s QPI, No Turbo, 4C, 80W, Max Mem 1333MHz OK ?

5. RAID - hardware raid is always recommended?

6. HARD DRIVES: Three 10 or 15K drives in a raid 5 is a great configuration if you can afford it

7.  Use backup to disk. it's cheaper and faster. We use Backup Exec.

Hope this helps!
Tony GiangrecoCommented:
Hi finance_teacher , have we answered your question?
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