Grandstream Networks HandyTone HT286 Product Related Questions page 22

up to 5 minutes to read them. Please do not refresh the web interface at this time as the DVS will
restart reading the SD/USB drive. Grandstream is currently working on a fix for this issue.
Q: Why is there a black / flashing bar at the bottom of the video feed?
This can occur if the DVS does not recognize the standard of the connected camera. If you
experience this issue, please restart the DVS. The DVS will detect the standard of the connected
camera and use that standard when the DVS boots up. To avoid this make sure to connect analog
cameras before the DVS boots up.
Q: Port forwarding
Two ports must be forwarded on your router to watch video from a DVS 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 is 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.
Q: How do you connect Alarm equipment to the Alarm-Out connection on the DVS?