How can I make a call between extensions?

1. Brekeke Product Name and Version: PBX 3.3.4.4

2. Java version: 1.8.0

3. OS type and the version: windows7

4. UA (phone), gateway or other hardware/software involved:

5. Your problem:

I just set basic configuration of PBX(created extension users, sip users)

and then I tried to make a extension call but I failed.

What should I do more configurations??

excuse me.. I am newbie for Brekeke PBX.

please let me know what I have to set for extension call

http://wiki.brekeke.com/wiki/Brekeke-PBX-v3-Quickstart

check setup as wiki page above
- is there any sip users shown from sip server side "Registered Clients" side?
- did you assign these registered users in pbx user extensions / phones page?
- capture packets at brekeke server and check what error response from brekeke pbx to the call
http://wiki.brekeke.com/wiki/Capture-Packets-Wireshark