Here are some D-link router common issues and There resolutions:
Want to determine number of users is on the wireless network: There are many enterprise-class wireless monitoring tools available in the market that can provide you information about the users of your wireless network, such as Air Magnet. You can also check it manually with your system go to your screens that are usually labeled "Attached devices" or "DHCP client list" to see who is connected and using which IP addresses. Some companies provide that feature with the router that shows how various clients have connected with your network and what wireless devices they are using.
Enabling file sharing from your router: Various routers include USB ports with them, such as those from Linksys, Belkin and Netgear. It's all about that what software is you are using to configure the USB drive and whether you need anything else on the Windows or Mac client end to connect to the shared drive.
Router connection is crashing regularly: At times the router is turned off because of any reason at that time this kind of error occurs. To resolve this make sure that power strips are switched on and receiving required electricity. If the router can't connect to the Internet but is otherwise operating normally, ensure any modem cables are not loose and connect properly.
DSL is stable but still no browsing: This issue is quite rare occurs and to resolve it you need to check whether your modem is having your authentic user-id or not. If it is showing something like "multiplay", change it with your user-id, put password, save and reboot the modem and try. Check whether Ethernet/USB/Wifi port of your machine is in Disabled state. If so, enable it.
If the above resolutions have not worked for you and you need live assistance to resolve your issue, there are also many options available that can offer you the same. There are many independent firms available in the market. They can offer you quick Support on-call D-link router via expert technicians who are capable to resolve your issue instantly. You have to dial D-Link Support Number and Expert will solve your Router related issues soon as possible.