Hello Whitestar, I did what you had asked me to do: First, I disabled DHCP in the D-Link 2730u modem. As soon as I did that, I couldn't connect to the router by Wifi by typing 192.168.1.1 in browser page. Today, I connected the GTPL cable to one of the LAN ports of the modem, and connected one side of another cable to the second LAN port of the router and the other side to the laptop. Then I clicked the networks icon in the system tray of Win 8, and when the right-hand side sidescreen opened, I entered the GTPL username and password, and I was instantly able to connect to GTPL! So what you said about the modem acting as a switch has worked. I didn't need to buy another router, at least for the time being.
I still cannot open the 192.168.1.1 page in the browser, even though I am connected to the modem by cable. Then I connected by Wifi, and the 192.168.1.1 page did open, but the connection is limited, and half the time it doesn't open. What do I do to open the page when connected by cable only?
I still cannot open the 192.168.1.1 page in the browser, even though I am connected to the modem by cable. Then I connected by Wifi, and the 192.168.1.1 page did open, but the connection is limited, and half the time it doesn't open. What do I do to open the page when connected by cable only?