Approach Tech NVR-2018 - Manual (Page 74)

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NOTE: When connecting to a network, each connected NVR must be assigned a unique
IP, which must be in the same class type as your network address. IP addresses
are written as four sets of numbers separated by periods; for example,
192.168.0.1 Therefore, if the connected network is identified as Class C, for
example, the first three sets of numbers of the NVR IP address must be the same
as the network address. If the connected network is identified as Class B, the
first two sets of numbers of the NVR IP address must be the same as the network
address. If you have any questions regarding these settings, please contact a
qualified MIS professional or your ISP.
11.3 TCP/IP Communication Software
Follow the instructions below to install the TCP/IP communication program into your computer.
Click the Start Menu from your computer, and point to the Settings/Control panel.
Click the NETWORK icon twice to enter the NETWORK setting windows.