Store backup to FLASH memory feature

Feature:	Backup of running configuration to on-board file
Default directory number:	7820, 7821
Feature number:	41
Parameter 1:	0 = Backup (7820) 2 = Master Backup (7821)
Description:	Backup of the running configuration to a on-board file called backup.bin. The file is stored in the flash memory, and survives autoload. A backup is made by dialling 7820 (or 7821) + M-key on a SuperUser station. 7820 Backup: The running configuration is restored from the backup file (backup.bin) every time the exchange reset. When using this backup option, a master backup (7821) should be made every time the configuration is changed, if not the changes are lost after next reset or power off. 7821 Master Backup: The running configuration is restored from the backup file (backup.bin) every time the exchange reset. When using this backup option, a master backup (7821) should be made every time the configuration is changed, if not the changes are lost after next reset or power off.