Digital Watchdog VMAXandCore DW-VAC42T User Manual page 64

9. Why can't I backup or upgrade firmware through my USB memory stick even though it
is detected by the DVR?
1) Make sure the USB memory stick is formatted by FAT or FAT 32.
2)
It is not allowed to use partitioned and/or password-encoded USB memory sticks.
10. Why won't the firmware upgrade using a CD?
1) DVR detects the files only when they are in root directory.
2) Files in sub folder cannot be detected.
3) It is recommended to upgrade firmware with USB memory stick.
11. Why won't my Time sync work through NTP server?
NTP server requires DNS server address. Please check if DNS server address is correct
at [Network] tab.
12. Why am I not receiving notifications via E-mail transmission?
1) E-mail notification function work based on SMTP service.
2) Please check if the sending mail address is correct and if the mail server supports SMTP service.
3) In case using SMTP service which is based on TLS authentication (including SSL) such as Gmail
and yahoo mail, please enable [Use SSL Authentication at [Notification] tab.
4) SMTP service is provided based on DNS. Please check if the DNS server address is correct on the
[Network] tab.
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