User's Manual

GXV3500 Digital Video Encoder/Decoder
Firmware 1.0.1.38 Page 31 of 32
Grandstream Networks, Inc. 08/2011
12. It is recommended that you save your video files in different directories when
using GSurf and GS_NVR.
GSurf and GS_NVR are different programs that have the ability to delete recorded video files.
It is better to save video files in different directories when using GSurf and GS_NVR in the
event that they automatically delete files that you might want to keep.
13. How can I use a cell phone to watch the GXV3500 video stream?
You must set the video resolution to QCIF to watch the GXV3500 video stream from a cell
phone. Make sure to set the bit rate to 64kbps to ensure the best video quality.
14. Why doesn’t the IP address of the device reset when I click the “Restore” button on
the Maintenance page?
The GXV3500could be installed in areas that are not easy to access. For example, it could
be installed on the roof of a building or the ceiling of an office. This makes it difficult to
reinstall the device, therefore the “Restore” function will not clear the IP address. Press the
RESET button on the device for at least 6 seconds until you hear a beep to perform a factory
reset of all parameters (including the IP address).
15. Why can’t the live video stream be viewed using a mobile phone or GSurf after
changing the HTTP Port of the device?
Make sure that the RTSP port of the device is set to 2000 plus the HTTP Port number. For
example, if the HTTP port is 88, then the RTSP port of the device that you configured on
GSurf / mobile phone should be 2088.
16. Why is there a black / flashing bar at the bottom of the video feed?
This can occur if the GXV3500 does not recognize the standard of the connected camera. If
you experience this issue, please restart the GXV3500. The GXV3500 will detect the
standard of the connected camera and use it when the GXV3500 boots up. To avoid this
make sure to connect analog cameras before booting up the GXV3500.
17. Port forwarding
Two ports must be forwarded on your router to watch video from a GXV3500 that is located
on a private network from a PC in a public network. The web port (HTTP) and the RTSP
port. Please make note that the RTSP port number changes according to the web port. If the
web port is 80, then the RTSP port is 554. If the web port is not 80, then the RTSP port equals
the web port +2000. For example, if the web port is 88, then the RTSP port will be 2088.
18. Tested PC display adapters.
Display Adapter
Test Result
SiS 650/651/740/661 FX/741/760 Series
Works normally
Intel(R) 82945R Express Chipset Family
Works normally