I just got the MTNL Triband installed on my IBM X40 running RHEL 4WS and it was a snap! Once the hardware was plugged in, all I did was go to the terminal, do a "service network restart" and I was online! The MTNL guy who came to set up my connection had never worked on Linux and said that if he had to set this up on Windows XP he would have to do a whole bunch of configuration.
As that old ad goes, "You come a long way, baby!"
Venky