OpenPhone 71/73/75 System Telephones71. OpenPhone 71/73/75System TelephonesThe OpenPhone 71, OpenPhone 73 and OpenPhone 75 are corded system tele-phones that you can operate on your OpenCom 100 or OpenCom X300 communi-cations system. The MenuCard display makes your telephone easy to operate andgives you fast access to your system’s wide range of different functions and fea-tures.The OpenPhone 71, OpenPhone 73 and OpenPhone 75 have the same function-ality, the only difference being the size of the display and the number of program-mable keys available. Furthermore, the OpenPhone 73 and OpenPhone 75 can beexpanded by means of an add-on keypad module with a display, that offers addi-tional programmable keys (see page 31).The OpenPhone 73 and the OpenPhone 75 are also available as IP telephones(OpenPhone 73 IP and OpenPhone 75 IP). These telephones have the same func-tionality as the standard system telephones. All of the functions described in thisguide are also available for the IP telephones. The chapter VoIP Telephones startingon page 82, contains a short summary of the information necessary for the IPsystem telephone user.You can activate the features and program functions on the telephones them-selves, or equally conveniently, use the Configurator of the communicationssystem.About this User GuideThe description of the various functions of your system telephone covers (unfortu-nately) many pages. Not every user has the time and leisure to read the guide fromstart to finish before telephoning for the first time. The following chapters aremandatory reading before using your telephone:■ Safety Precautions starting on page 8: These tips are for your own safety andhelp you to protect the telephone from damage!■ Installation Site starting on page 9
