PC sharing problem ?
 

I have a computer training centre comprising of five computers all with the following configuration: Intel 945 GV Chipset motherboard, 2.6 GHz Pentium IV processor, 80 GB SATA hard drive, 512 MB DDR2 RAM and other accessories.

I also have a 1 Mb/s BSNL broadband Internet connection. I connect all the PCs by using CATS straight through cable to form the LAN and connect one PC by using a C2110 Nokia-Siemens modem provided by BSNL I get the 1 Mbps of speed and it goes smoothly. But my problem is whenever I want to share the other PCs to use the broadband connection, it does not happen and it displays a message, "The phone line is busy". Another problem is how can I convert a video file from a DVD and make a VCD. Please help.

I think contect to hardware networking spe############t.