How-big
The question is asked weekly - "how many users can trixbox handle?", or "how big does my server need to be for 1000 users?".
There are several very important factors that will affect this, see links below for details. The answer to this question is not based on how many users, it is based on how many simultaneous calls and how those calls are made.
trixbox is mainly geared towards the office PBX, it is not designed to be a service provider, you could use it as such in a small capacity, but it will not scale. As a general rule of thumb you want to think about having 1 trixbox server for every 100 simultaneous calls (4 T1s). If you have a larger install, you need to break it up into seperate boxes. trixbox does not support load balancing or clustering at this time, but it is easy to build your dial plan to spread your load across multiple boxes.
>For medium sized office use 8-24 trunks normally any modern dual core CPU based system will do + 1gb ram.
>For larger 24-48 trunks think about dual Xeon ~2.0 ghz + 2gb RAM + SATA RAID 1 (RAID5 is slow).
>For 48-100 trunks think about dual xeon ~2.8-3.0ghz + 4GB RAM (any more ram will not help) + SAS RAID1 or consider 2 of the 24-48 trunk sized servers.
You may want to look through the server and motherboard lists.
DO NOT make a choice based on the above if you have more than 48 trunks, read ALL of the discussion below so you have full understanding of what you are doing:
Please post more detailed answers to this question here:
http://www.trixbox.org/forums/trixbox-forums/open-discussion/1000-extensions
http://www.trixbox.org/forums/trixbox-forums/open-discussion/load-balancing
http://www.trixbox.org/forums/trixbox-forums/open-discussion/extensions-limit#new
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