From VoIP.ms Wiki
In order to configure the SNOMD785 to be used along our service it is required to access it's web interface settings. For this, the IP address of the device must be acquired.
To perform this click on the "Settings" button of the phone. Once on the settings menu, scroll down to: "Information" , then select: "System info". On this section, you'll need to take note of the IP address shown beside: "IP Adr". It should read back something as: "192.168.0.1".
Once you have the IP address please open a web browser of your preference and it's URL bar enter the IP address you got by prepending: http:// so it looks such as: "http://192.168.0.1" and access it.