Deskphone Favorite Contacts (speed dials) Sign into your RingCentral online account using Single Sign-On. Use your SFCM Campus ID information (full email address & password). Click Settings and open the Phones & Numbers drop-down menu item. Click on Presence. The first two lines are always reserved for you. For the remaining lines, please click Assign Extension. Enter the name of the RingCentral contact you'd like to select, and check the check-box next to their name to select them. Click Assign. Repeat this process as many times as you'd like (or have space for on your phone's screen). Save and exit.