HIKVISION ERT-F204 Series User Manual page 142

ERT-F2xxx DVR User Manual
The IP camera frequently goes online and offline and the status of it displays as "Disconnected."
Possible Reasons
The IP camera and the DVR versions are not compatible.
•
Unstable power supply of IP camera.
•
Unstable network between IP camera and DVR.
•
Limited flow by the switch connected with IP camera and DVR.
•
Verify the IP camera and the DVR versions are compatible.
Enter the IP camera Management interface Menu > Camera > Camera > IP Camera, and view the firmware
version of connected IP camera.
Enter the System Info interface Menu > Maintenance > System Info > Device Info, and view the firmware
version of DVR.
Verify power supply of IP camera is stable.
Verify the power indicator is normal.
When the IP camera is offline, please try the ping command on PC to check if the PC connects with the IP
camera.
Verify the network between IP camera and DVR is stable.
When the IP camera is offline, connect PC and DVR with the RS-232 cable.
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.
Verify the switch is not flow control.
Check the brand, model of the switch connecting IP camera and DVR, and contact the manufacturer of the
switch to check if it has the flow control function. If so, turn it down.
Check if the fault is solved by the step 1 to step 4.
If it is solved, finish the process. If not, contact an engineer from our company for further processing.
No monitor connected to the DVR locally, and when you manage the IP camera to connect with the device
by Web browser remotely, the status displays as Connected. And then you connect the device to the
monitor via VGA or HDMI™ interface and reboot the device, there is black screen with the mouse cursor.
UM ERT-F2xxx 030118NA 141