If your Aastra phone was purchased from VoIPstudio, it has been already pre configured and there is no need to provision it.
Please refer to Phone edit section to assign extensions. If your phone was not purchased from VoIPstudio, please perform a Factory Reset described in Factory Reset section above.
You can obtain your phone IP by following the steps described in Find phone IP section above.
Find your phone IP, and log in to your Phone (by pasting the IP on your web browser) Your Sip Info can be found as shown here Figure 7.7 point 1 this link
* Save settings and Reboot your phone.
1.Enter dialplan x+#|xx+*