i called customer care, told wanna use multiple systems and dont want to use dial up web page..with in half an hour
they did changes and informed me as they did Natting and enabled DHCP on CPE.
dialing up each time got resolved, when i switch on CPE it connects automatically.
for multiple PC/laptopos to connect.
cable from CPE, i have connected to one of 4 switch ports on my Linksys wireless router which i bought for BSNL.
On linksys, changed PPoE to Bridged mode, disabled DHCP gave linksys ip as 192.168.1.2, since 1.1 is is tata indicom CPE, thats all all 5 systems working (for wireless to work cofigure on linksys)fine since 4 months.....no issues.
-------------------
or get a 8 port switch(arond 4 to 5 hundred), connect cable from CPE to any of the port and remaining ports to computers...works fine.
any one want details steps let me know..