Snom M3 Configuration Guide
Find the IP address of your phone - Pressing the + key on the left of the phone will display the IP address.
Vist the IP address in a web browser. It should look something like http://192.168.1.2 in your address bar.
Select 'Identity 1' on the left of the web interface, fill out the options as follows:
Server is local: No
Display Name: Your Name
Account: Your Voipfone Account Number
Password: Your Voipfone Account Password
Authentication Username: Your Voipfone Account Number
Server Port: 5060
Re-registration time: 60
Select 'Telephony Settings' followed by 'Reboot'
After the reboot your phone should connect successfully
The following test numbers will help you confirm the phone is working:
152 - Sound Test
155 - Confirmation Message