User's Manual

backup of the system configuration. See Creating a backup of the system configuration on
page 229 for more information.
Procedure
1. Attach the serial cable between the PC and the DTE port on the control unit.
2. Start the terminal program on your PC.
Note:
Ensure that the DTE port settings are configured as described in
RS232 DTE port
settings on page 242. Within a HyperTerminal session, the current settings are
summarized across the base of the screen.
3. Arrange the program windows so that the terminal program and Manager TFTP log
are visible at the same time.
4. Switch off power to the control unit.
5. Power on the control unit and press the escape key every second until you get a
loader message. An example of this message is:
P12 Loader 2.4
CPU Revision 0x0900
6. Enter AT (upper case).
An OK response appears. If OK does not appear, check the settings of your terminal
program.
7. To erase the alarm log, enter AT-X1.
8. To erase the backup configuration stored in non-volatile memory, enter AT-X2.
An OK response appears.
9. To erase the current configuration in RAM memory, enter AT-X3
A series of OK responses appear.
10. Switch power to the control unit off and then back on.
Messages appear as the control unit performs the start-up tasks.
11. Close the terminal program session.
12. Use Manager to edit and then upload an old configuration file or receive and edit
the system's now defaulted configuration.
DTE port maintenance
Implementing the Avaya B5800 Branch Gateway November 2011 245