1) Auto Provisioing - Astra phones
[Currently not supported until further notice]
2) Manual Provisioing - Astra phones
Step 1 - Sip Account Settings: Please see the screenshot below.
Step 2 - Set the dialplan to:
[2-9]11|911|[2-9]xxxxxxxxx|1[2-9]xxxxxxxxx|011x+#|xx*|*xx+#|xxxxxxxxxxxxxxxxx#
Step 3 - Reboot the phone