Network Video Recorder User Manual
218
If not, please contact the engineer from Hikvision to do the further process.
The IP camera frequently goes online and offline and the status of it displays as
“Disconnected”.
Possible Reasons:
− The IP camera and the NVR versions are not compatible.
− Unstable power supply of IP camera.
− Unstable network between IP camera and NVR.
− Limited flow by the switch connected with IP camera and NVR.
Step 1 Verify the IP camera and the NVR versions are compatible.
1) Enter the IP camera Management interface “Menu > Camera > Camera>IP Camera”, and
view the firmware version of connected IP camera.
2) Enter the System Info interface “Menu>Maintenance>System Info>Device Info”, and view
the firmware version of NVR.
Step 2 Verify power supply of IP camera is stable.
1) Verify the power indicator is normal.
2) When the IP camera is offline, please try the ping command on PC to check if the PC
connects with the IP camera.
Step 3 Verify the network between IP camera and NVR is stable.
3) When the IP camera is offline, connect PC and NVR with the RS-232 cable.
4) Open the Super Terminal, use the ping command and keep sending large data packages to
the connected IP camera, and check if there exists packet loss.
Simultaneously press Ctrl and C to exit the ping command.
Example: Input ping 172.6.22.131 –l 1472 –f.
Step 1 Verify the switch is not flow control.
Check the brand, model of the switch connecting IP camera and NVR, and contact with the
manufacturer of the switch to check if it has the function of flow control. If so, please turn it
down.
Step 2 Check if the fault is solved by the step 1 to step 4.
If it is solved, finish the process.
If not, please contact the engineer from Hikvision to do the further process.
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