First do not insert the WLAN card in to your modem. connect it with supplied LAN cabel or via usb.
Go to your computer eathernet connection setup and change the ip of your eathernet card to the following.
IP Address : 192.168.1.2
Subnet Mask : 255.255.255.0
Default Gateway : 192.168.1.1
Now in you browser window open up the configuration screen of MT841
in the left side you see the wizard from basic drop down list select connections. Left side you see PVC0 to PVC6 now you only need to change the value of PVC0 to dial up the connection automatically with PPPoE setup. but some how you can not edit the connection of PVC0 by clicking the note icon on the configuration screen. it only let you change the settings for wich the PVC is created and let you delete it. so you need to delete all the PVC in the list. Stat from PVC6 press notes icon and delete.
Do the same process for PVC6 to PVC2 and PVC0 do not delete PVC1 untill you create new PVC.
now press the new button and create new PVC specify following parametere in the PVC
WAN Type : PPPoE
VPI/VCI : 0/35
Encapsulation : LLC
Default Route : Enable
User Name : <Your User Name>
Password : <your password >
use DNS : Enable
now click on apply. It will show new PVC and it display it as PVC1 now delete PVC0 from the list and start create remaining PVC for your connection by pressing new.
All PVC shoud have following property.
Wan Type : Bridge
Encapsulatino : LLC
and for VPI/VCI follo this steps
PVC1 : 8 /35
PVC2 : 0 /100
PVC3 : 0 /32
PVC4 : 8 /81
PVC5 : 8 / 32
PVC6 : 14 / 24
now you have created all the PVC's with you dialer configured at PVC1
go to advanced select Firewall and select enable.
go to DNS selct Ebable and put following value in the dns
Primary DNS : 220.127.116.11
Secondry DNS : 18.104.22.168
save your change and reboot the router.
After reboot you should be automatically connect to the internet without dialing PPPoE dialer from the computer. now turn off the router and connect the WLAN Card to the router and disconnect the LAN cabel from the modem and computer. after you see the WLAN light on in the router stat your WIFI connection from computer or modem to search for availabe network and you will be connected to the net.