Ultimately after several tests I successfully configured PTCL EvDO PCMCIA on my laptop with gentoo linux.
Evolution-Data Optimized (EVDO) is a wireless broadband service offered by PTCL and worldcall.
Following is how i was able to configure PTCL EvDO PCMCIA adapter.
insite ~ # uname -a
Linux insite 2.6.28-gentoo #1 Fri Jan 9 09:49:32 PKT 2009 i686 Intel(R)
Pentium(R) M [...]