D-Link DSL-2640-T. After power outage, I have a good wireless connection BUT no internet access. LAN line does not work either. Please suggest possible solutions.

It should work "out-of-the-box".
Be sure to connect using "straight-through" (not "cross-over") Ethernet cables.
Connect from the 'WAN' port on the router to your DSL-modem (or cable-modem).
Power-off the DSL/Cable modem.
Power-on the DSL/Cable modem.
Power-off the D-Link.
Power-on the D-Link.
Reboot your computer.
You should be good.

It could be a hardware problem, try Resetting the D-link back to the factory defaults and configure the D-link again.
Press and hold the RESET button at the back of the router with the power ON until the LEDs flash at the time the release the RESET button. (firmware version was 3.00, and upgraded to 3.05)
Connect a LAN cable from the D-Link to your laptop computer's LAN port, open the browser on your laptop/computer and enter the D-Link's configuration URL..
http://192.168.0.1
The default login = admin
The default PW = blank (just press Enter)
You can now change the default admin password.
You can now configure the wireless settings. (SSID, WPA or WPA2 encryption to protect your wireless network and Internet from unauthorized access).
Now configure the wireless card in your computer laptop with the router's wireless settings.
To secure your wireless network from unauthorized access, please click on this link and follow my instructions :-
http://www.fixya.com/support/r3559128-wireless_router_security

Hi,
Connect modem lan cable to Router Wan / Internet port. From Router Lan port you can either connect your system or switch . wireless : Scan for wireless network from your wireless system. If it shows, connect to your wifi network
Thanks

Since your D-Link 2640 is a modem + router it may not work the way you intend.

You need just a wireless router without modem.

Run a small Ethernet patch cable from your Paradyne modem into the WAN port on your router, you can plug your existing Ethernet cable into one of the other LAN ports on the router, then access the router setup using the computer connected to the Ethernet cable using a browser and putting the router's IP address into the address line of your browser. It will most likely be 192.168.0.1 or 192.168.1.1.

Once you have configured the Wi-Fi router you will have your wireless network. Full instructions should come with the router.

Routers are available for as little as $29.95 but expect to pay closer to $79.95 for satisfactory speed and capability.

Forward xbox port numbers on the router.

1,there is a reset button
2,press this using any pin with power
3,automatically restart
4,connect your router with pc
5,type 192.168.1.1 on the browser
username:admin
password:admin12 or admin
configure router
enable dhcp

let me give you few suggestions and then you can take it from there.

firstly IP camera is just what its name says..it needs a fixed IP address it may be local as in your lan where it is working or a IP address from ISP.
Now when you connect it behind router... it is essentially a camera connected to LAN.
now the problem is DYNDNS.com will give access to your router since that is connected to dynamic IP addressing. However Ip camera is behind router and to access it you need to open proper protocol and port in router .consult your router manual for doing that.

with your current setup that is the only solution. however you can connect Ip camera directly to ISP line and then use dyndns as in case of router. though i dont know how feasible that will be for you.you have not mentioned IP camera model so cant help with specific details.

1. USB modem is connecting a PC USB port with a DSL phone line: CANNOT be connected to a ROUTER LAN (ethernet NOT USB port).
2. Wireless ROUTER is NOT a modem and it CANNOT connect the Internet (or WAN) LAN port to any "phone line"
3. Connect the Router Internet (WAN) port to Modem (you need a LAN MODEM = a modem with a LAN/ETHERNET port)
4. Be sure your internet is running before strting ROUTER configuration with Router Company CD
   

i think your problem is the configuration,in the security of your wap.try to configure it again.

First I will need to know the type of ISP service you have, T1 - DSL - ADSL - CABLE - etc. And the connection type, STATIC IP - DYNAMIC IP - PPPOE - etc. BPCS