Possible reasons: extension 12 v power supply, network is obstructed. Processing method: check whether the extension to the 12 v power supply with input, and the right. Cable is broken, short circuit, crystal head loose. Note; New installation with household room number positioning code must be entered correctly.
Date:
2016
-
08
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12
Views：8
Possible reasons: the network to the management center machine whether unobstructed, or fiber optic equipment is normal. Methods: to check whether the cable break, short circuit, crystal head loose. Communications equipment is normal.
Date:
2016
-
08
-
12
Views：7
Possible reasons: network whether unobstructed, switch is normal. Methods: to check whether the cable break, short circuit, crystal head loose. Switches have electricity, can replace the new switch test.
Date:
2016
-
08
-
12
Views：6
Possible reasons: according to the function of the system to determine the function of the network is smooth, such as: the network appears! SymbolProcessing method: check whether the cable is broken, short circuit, or whether the communication equipment with the computer is normal.Possible reasons: according to the function of the system to determine the function of the network is smooth, such as: the network appears' X 'signProcessing method: check the device connected to the switch is normal. Cable is broken.
Date:
2016
-
08
-
12
Views：9
Possible reasons: wiring error, the line is broken, short circuit, or the wrong machine and the power supply box is normal.Processing method: check the ladder to the power box to the power box to lock the line connection is wrong, whether the fault, short circuit. Re inspection of the machine settings, can be replaced with the new power box test.
Date:
2016
-
08
-
12
Views：6
Possible reasons: floor or room number line fault and short circuit. Processing method: check can not call the room number line, and the floor line is connected, the line is broken and short circuit.
Date:
2016
-
08
-
12
Views：6