# Ip pabx

**URL:** <https://community.asterisk.org/t/ip-pabx/29064>\
**Category:** Asterisk Support\
**Created:** [September 18, 2009, 4:26am UTC](https://community.asterisk.org/t/ip-pabx/29064 "2009-09-18T04:26:48Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![bebekmacho](https://avatars.discourse-cdn.com/v4/letter/b/b9bd4f/32.png) [@bebekmacho](https://community.asterisk.org/u/bebekmacho)\
**Post date:** [September 18, 2009, 4:26am UTC](https://community.asterisk.org/t/ip-pabx/29064/1 "2009-09-18T04:26:48Z")

</div>

Guys,

I’m planning to build 800+ user IP PABX. I will get premium support but now I need help determining the hardware. Please help.

TQ.

Bebekmacho

---

<div class="post-metadata">

**Author:** ![russelltreacy](https://avatars.discourse-cdn.com/v4/letter/r/ce7236/32.png) [@russelltreacy](https://community.asterisk.org/u/russelltreacy)\
**Post date:** [November 20, 2009, 7:43pm UTC](https://community.asterisk.org/t/ip-pabx/29064/2 "2009-11-20T19:43:05Z")

</div>

Hi,

That is a sizable requirment.

Planning Hardware for asterisk you need to answer the following questions: This will help you determine the CPU, memory and bandwith overhead.

1. How many concurrent calls… Whats the application? A large office or call centre?
2. How is your PBX connected to the outside world. Voip or Physical lines coming into your office?
3. Feature Requirments, IVR etc.
4. Phone models you intend to use.

Can you download some stasticics from your current system for number one? I.e. over a month, will give you a good idea as to what peak capacity you need.