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3.8 Additional functions
3.8.1 Restarting cameras in case of hanging
PSW-2G+Hot continuously monitors connection of the camera to the switch.
There are three ways to detect camera hanging:
•
No connection to the camera (Link)
•
No response to service requests (Ping)
•
Reduction of port speed below the established limit (Speed)
The switch continuously (once a minute) monitors the Link signal from the IP
camera. If the switch fails to detect the Link signal, then a one-minute timer is
started, and after that the connection is checked again. If the Link signal does
not appear, the switch removes power for 10 seconds and supplies it again,
restarting the camera. In other words, if the switch fails to see the Link signal
from the camera twice in succession at an interval of 1 minute, it restarts the
camera. The Auto Restart option is available via the Web interface in the
Special Function section (see the Configuration Manual).
The switch constantly (1 time per minute) polls the IP camera. If the switch does
not receive a response, then a one-minute timer is started, during this time the
poll is repeated every 10 seconds. If the camera has not responded within a
minute, the switch removes power from the camera for 10 seconds and supplies
it again, restarting the camera. If the camera has responded at least once, the
switch decides that the camera is functional and starts the poll cycle again,
polling the camera 1 time per minute. The Auto Restart option is available via
the web interface in the Special Function section. To use this function, it is
necessary to enter the IP address of the camera. Make sure your camera
responds to PING (see the Configuration Manual).
The switch continuously monitors the speed on the port the camera is
connected to. If the flow rate goes below the established limit and fails to
Video camera restart using Link signal
Camera restart due to no response to Ping request
Camera restart in case of port speed reduction
