D-Link DVG-5004 Operation Manual page 65

SIP Operation Manual V2.6
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Select TCP/IP, and then click Properties.
Select "Use the following IP Address " and enter IP address, Subnet Mask, and Default Gateway. Please
note that an IP address in the same domain cannot be reused. Then, enter the DNS server IP address
(varies in different networks. consult your ISP's service for information). Click the "OK" button and after
completing the settings, users can use both the VoIP and network services concurrently.