From VoIP.ms Wiki
Find your IP address and login
Once you have connected your device to your local connection, it will be necessary to obtain the local IP address that was designated for it.
From your IP phone navigate through the menus to obtain its IP address
OK >> Status >> IP Address
Now that you have the Local IP address, open it in your web browser of preference.
Once you have opened the login page, use the following credentials to access to the configuration:
Username: admin Password: admin
-Once you see the settings page, go to the following:
Line >> Sip 1# >>
UserName: Username or sub-account
Display name: Optional
Username: Your voip.ms Account or sub-acount
Display name: Name your display name like Line 1.
Authentication Name: Your voip.ms Account or sub-acount.
Authentication Password: Your Sip account or sub account password.
Server Name: houston.voip.ms
Register Address: houston.voip.ms
Register Port: 5060
Proxy Server Address: houston.voip.ms
Backup Proxy Server Address: You may need to use houston.voip.ms again.
Backup Proxy Server Port: 5060
Activate: Check activate.
Refresh page and see if it shows registered.
Phone Settings >> Time/Date >>
Time Synchronized via DHCP: Yes
Time zone: Select your time zone
12-hour clock: Yes (Optional)
Location: Select location you are in for daylight saving.