76Figure 7-37 BackupSelect “VTH Info”, and click “Backup”, so VTH info will make a backup in VTO. Restore BackupClick “Restore Backup”, so card info and VTH info is restored to backup info. Export ConfigClick “Export Config” to export config info and save it at local device, so as to restore configor import into other devices. Import ConfigClick “Import Config” to import local config files to the device, so as to restore data orsynchronize data. Default AllClick “Default All”. After confirmation, the device will reboot, and restore all info to defaultstatus, except IP address.7.8 Indoor ManagerManage VTH info and card info in the system. Select “System Config > Indoor Manager”, andthe system displays “Digital Indoor Station Manager” interface, as shown in Figure 7-38.Figure 7-387.8.1 Add VTH Add master VTH. After “Network” interface of extension VTH has added and enabled master VTH, VTOinterface will obtain extension VTH info automatically.Click “Add”.Step 1The system displays “Add” interface, as shown in Figure 7-39.