What survivability modes are supported?
-  optiPoint 150 S supports DNS SRV, which is used in optiPoint connectivity to Sylantro environment.
How can I upgrade my phone with the SW downloaded here?
-  Please unzip the compressed Firmware. Follow the procedure to do the software upgrade for your phone (via HTTP). 
| All files must be in the proper folder on your local PC. | 
-  See optiPoint 150 S Software Upgrade Methodology
-  Start Webpage in your Browser: http://###.###.###.###(# stands for the digits of the telephone's IP address)
-  Webpage login: User admin, default password123456.
-  Click Utlities > Upgrade to enter firmware upgrade process
-  Press Browse button to select the firmware file
-  Press Confirm button to activate firmware upgrade process
-  Press Restart Terminal
-  Press Restart button