Aastra Dialog 4223 Dialog 4223 Professional for MD Evolution, user guide - Page 151

Your Extension's Accessories Your Extension's Accessories You may also add the following optional accessories to your extension: • One or several DBY 419 01 satellite(s) or add-on key panel(s). From one (1) to four (4) satellite(s), each one offering 17 repertory keys that may be programmed with your most often used internal or external telephone numbers or telephone service codes. • A DBY 420 01 add-on interface module. As the case may dictate, this module may enable you to connect, for example, an external ring device, or an external device visually indicating your extension's free, ringing, or busy status. This accessory is generally for alarm or security extensions. • A headset. This can allow you to process your calls using a headset, rather than in handsfree or handset mode. This is especially useful for ICD group agents who process phone calls all day long. This section provides you with all of the instructions necessary for installing these accessories. It also includes the instructions for using a headset. For the programming and use of the add-on key panels' or satellites' repertory keys, see the "Programming Your Extension", "Operations for Outgoing Calls" and "Group Services" sections. Note: You may add up to 4 satellites on your extension without requiring any additional power supply units. All of the satellites are powered from your extension, which is powered through the telephone system. 152 MD Evolution - Dialog 4223 Professional