User Manual
User Manual | 58
6.
Q & A
1) DVR does not record images in sensor mode and/or motion mode.
It records images only when there is an event for the corresponding mode.
Check that the settings are correct at the menus: EVENT > SENSOR,
EVENT > MOTION ALARM, and RECORD > SCHEDULE.
2) There is a HDD installed but “No HDD” icon ( ) is still shown on the screen.
Check the cable connection of the HDD again.
If you can see the HDD list at SYSTEM > HDD but the capacity indicates “0”, the
HDD requires format.
3) There is nothing displayed on the HDMI / VGA monitor though electric power is
supplied to the DVR.
Check if the power is supplied properly. You should be able to hear the noise from
the fan and HDD operation.
Check the HDMI / VGA cable connection with the DVR. Remove all the cable
connections, except for the monitor cable, and then apply power to the DVR again.
In case that the display screen is stopped at logo screen, please contact DW’s
technical support for additional information.
4) Is it necessary to open the port when using DDNS?
Yes, it is. DDNS is the function that lets remote connections acknowledge the
changed address of the DVR (dynamic IP provided by ISP) or to allow connection to
the DVR by domain (domain.dynlink.net) without memorizing IP.
5) Remote software connection to the DVR works fine but WEB connection does not work.
Some ISP blocks port number 80. Please try again after changing WEB port. (8080
is recommended.)
Check whether port 80 is opened or not.
6) Image is not shown after login at WEB monitoring
TCP Base port should be opened. Default of TCP base port is 9010.
7) Image on the remote software has suddenly disappeared after displaying for a short
time.
Some ISP restricts upload data/traffic volume. Please contact your ISP.
Upload traffic restriction can be easily checked with the following steps.
i. Turn off the power of your Modem & Router.
ii. After 60seconds, turn on the power of your Modem first and then Router.
iii. After reconnection, if it is disconnected again after a shot time (in a similar
period later), it means that the ISP restricts upload traffic.
8) Backup or firmware upgrade through USB memory stick cannot be made though it is
detected by the DVR.
USB memory stick should be formatted by FAT or FAT 32.
It is not allowed to use a partitioned or password-encoded USB memory.
9) Time sync through NTP server does not work.
NTP server requires DNS server address. Check if DNS server address is correct at
the NETWORK setup page.
10) E-mail transmission does not work in using E-mail notify function.
E-mail notify function works based on SMTP service.
Check if the sending mail address is correct and if the mail server supports SMTP
service.
If you are using an SMTP service which is based on TLS authentication (including
SSL) such as Gmail and yahoo mail, enable USE SSL AUTHENTICATION at the
NOTIFICATION setup page.
SMTP service is provided based on DNS. Check if DNS server address is correct at