| UNIT 4: PROGRAMMING - LESSON 2: SYSTEM PROGRAMMING BY PHONE Introduction Read pages 205 through 231 of the KX-TAW848 Feature Guide When the KX-TAW848 Main Unit is initialized, PT System Programming can be accomplished by connecting a KX-T7736 or KX-T7731 display telephone to port 01 of the Main Unit. All other extension ports are prohibited from performing system programming until permitted to do so within their respective Class of Service (COS). A programming overlay is included with each display telephone and is used for system programming. This overlay is placed over the programming telephones keypad to indicate which keys will be used to navigate through the various system programming procedures. There are two levels of system programming that can be accessed from a proprietary display telephone. The administrator level, allows access to all system program addresses without restriction. The user level can be customized (using the KX-TAW848 Maintenance Console) to allow access to specific programming addresses only. The ability to customize the user level allows the installer to determine how much access each end user should have. It is designed to prevent changes to system programming that may be critical to system performance, while still enabling basic system programming changes.