My collegue wanted to get internet access for 3-4 machines using a BSNL DATAONE Huawei router which already had 4 LAN ports.They were doing PPPoE dialout from individual machines; this wouldn't work with more than one machine at any one time.

Set up dialling out from the router similar to the BSNL DATAONE ADSL HOWTO

Except that the layout was different. Had to add a NEW PVC-7 - change its VPI/VCI:->0/35 after first changing PVC-0's value which was earlier 0/35 and hence causing a conflict. Most important - SAVE ALL button at the bottom did the rebooting of router. Maybe I'll put in screenshots later. And I'll need to help them with port forwarding for one of the machines to use Bittorrent.