Linksys SPA-941 - Manual (Page 151)

Linksys SPA-941 Telephone User Guide Set Up Outlook for TAPI 139
4. Click Call Contact on the menu (circled in the previous screen) to open the
New Call dialog box.
5. Click Dialing Options to open the Dialing Options dialog box.
6. Click on the drop-down menu in the Connect using line field and scroll down
any entries until you find your telephone number (circled).