To create and send an SMS message directly on the SDK:
From the SDK, go to the idle screen by clicking the SDK End Call soft key one or more times. You know you are on the idle screen when you see Go to, Menu, and Names on the display.
Select Menu > Messaging > Create message > Text message.
Use the keyboard or click the keys on the first SDK keypad to enter the phone number of the second SDK instance to which you want to send the message.
Enter a text message.
Select Send.
Enter and send additional text messages or select Exit to exit.