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Why computer working as a DVR goes disconnected?

We have 7 IP vivotek cameras, a PoE Switch, a DSL modem from ISP and a computer that has the software ST7501 installed on it, this computer has a static IP and eventually this computer shows "null or limited connection", if I unplug and plug network cable works again without problem, I have tried putting this cable directly to ISP modem, but the problem is still present, what could be happening?

The computer has windows 7 Professional.

Thanks in advance
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dimensionav
Asked:
dimensionav
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2 Solutions
 
CallandorCommented:
I would check the BIOS and OS for any sleep settings, because it sounds like the system powers down after a while.
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dimensionavAuthor Commented:
You mean sleep settings of NIC or operating system or both?
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CallandorCommented:
I mean both, and check for any powering down options in the BIOS that might be active.
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dimensionavAuthor Commented:
I will check those options and I´ll let you know.

I was wondering If the speed of the NIC (10/100) has something to do with the speed of the LAN (10/100/1000).
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Gary CaseRetiredCommented:
It sounds like the issue is almost certainly the power settings, as Callandor noted.    As for your last question, the difference in the NIC speed (10/100) vs. your router (10/100/1000) doesn't matter -- it simply means the system doesn't operate at gigabit speed since the NIC doesn't support it.
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dimensionavAuthor Commented:
I disabled all options of energy and the NIC failed again, I have installed another NIC in a PCI-E port since a 4 days ago without failing.

I have to mention that I disabled all energy shutdown or hibernating options in this new NIC as you said before.
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CallandorCommented:
>I have installed another NIC in a PCI-E port since a 4 days ago without failing.

Are you saying you installed another NIC in the same machine, and it works?  That would point to the original NIC having a hardware problem, and it should be replaced.
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