62 DBS 576 (USA), issued January 1999 576-20-700Chapter 3. System Features Section 700 - Operationpowered down or out of service. The System therefore continues to operate without interruption formost maintenance functions.A limited number of items such as the replacement of some common control circuit cards requires thesystem to be powered down.Hardware Requirements• N/ARelated Programming• N/AConsiderations• N/AProgramming DevicesDescriptionThe dealer may program the System either by using:• A digital key telephone equipped with display• A PC-Based Customizing ToolTelephone ProgrammingThe System can be fully programmed from an extension telephone equipped with 12 FF keys and adisplay. While major system configuration changes may be more easily performed using a PCprogrammer, all programming is available via a telephone. This is especially useful for minor changesto the system configuration.Hardware Requirements• N/ARelated Programming• N/AConsiderations• N/APC-Based Customizing ToolThe System can be completely configured using the PC-Based Customizing Tool. This may be doneeither by directly connecting to the System or by remote connection using a modem.The System database can be uploaded and downloaded for easy storage and retrieval.The PC-Based Customizing Tool connects to the System through the RS232C maintenance port.Hardware Requirements• N/A