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Accessing the Boot Loader Program

180 Chapter 18

testing module that detects and tests hardware components on the unit.

To access the Boot Loader program, do the following:

1. Connect the Ethernet cable from the console port on the rear panel of the

Digi CM unit to a serial port on a workstation. Use the Ethernet cable

packaged with the Digi CM unit and attach the DB-9 adapter. The arrow in

the following graphic points to the Console Port.

2. Set up a terminal emulation program, such as HyperTerminal, using the

following port parameters: bps=9600, data bits=8, parity=none, stop bits=1,

and flow control=none.

3. Turn the power on to the unit.

4. Press ESC within 3 seconds of booting the unit to get Boot Loader menu.

Hardware Test Menu

The Boot Loader program provides a hardware test for detecting and testing

hardware components on the Digi CM unit. From the Boot Loader menu,

choose the number 3 to access the Hardware test. Options for several

components appear.

Disaster Recovery

The Digi CM unit provides a disaster recovery procedure in the event the

configuration data is destroyed or corrupted. The Digi CM unit automatically

restores a corrupted configuration file system to the factory default settings.

However, if the Digi CM unit fails to boot in spite of being reset to the factory

default settings, the firmware can be restored by using the Boot Loader

program.

To restore the Digi CM unit to the factory default configuration settings, you will

need to use a TFTP or BOOTP server. To use the Boot Loader program to

flash new firmware, do the following:

1. Connect the console port on the rear panel of the Digi CM unit to a serial

port on a workstation. Use an Ethernet cable with a DB-9 adapter.

2. Set up a terminal emulation program such as HyperTerminal. Use the

following port parameters: bps=9600, data bits=8, parity=none, stop bits=1,

flow control=none

3. Reboot or power on the Digi CM unit.

4. Press the ESC key within three seconds of applying power to the device.

The following screen appears.

Console Port

back of Digi CM 32 shown

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Digi CM Guía de usuario Pagina 180