Grandstream Networks GVR3550 User Manual page 119

Unstable network
IP address conflict
MAC address conflict
Unstable network card on PC
12. USB backup error
CPU usage is too high, please stop recording then backup.
Data volume exceeds backup capacity
Incompatible backup devices
Damaged backup devices
13. Unable to close alarm
Wrong alarm settings
Open alarm manually
Input device errors or wrong connection
Wrong version, please upgrade
14. The alarm doesn't work
Wrong alarm settings
Wrong cables connection
One alarm is connected to two circuits the same time
15. Unable to control GVR3550/GVR3552 via remote control
Remote control distance is too far or the control angle is too tilt
Low batteries
Damaged control/front panel
16. Insufficient record time
Large stream caused by poor quality of the camera, dirty camera Lens, backlight
installation.
Insufficient HDD capacity
Damaged HDD
17. Unable to play downloaded backup file
You have not installed player or unplugged the external storage device improperly.
18. No images, black screen
Check IP, port, username/password of the remote camera.
Check the network connection with the remote camera.
19. Display screen is not complete
Check the resolution the LCD supports. If the GVR resolution is 1920*1080, the LCD
should support 1920*1080 resolution.
GVR3550/GVR3552 User Manual
VoIPon www.voipon.co.uk sales@voipon.co.uk Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299
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