A site is experiencing intermittent camera or recorder communication loss without a known explanation (for example, configuration problem, obvious network problem, and so on).
Variables that can be modified are the link speed and duplex setting of the NIC card on the recorder and the network switch's interface port. In most installations, these values are set to Auto-Negotiation. In some instances, setting this value to its maximum speed at full duplex actually resolved communication loss issues. Although this may or may not help, it is an easy modification to try.
LDVR (All versions)
Lenel IP Cameras
LNVR (All versions)
OnGuard 2009 (6.3.249)