Dial up USB CDMA ???
what ISP is it ........ Reliance Netconnect ? TATA Indiacom surf 2 Whiz ??
or are you connecting from a Wi-Fi Access point ?? (BSNL/Airtel Dialup? )
Are u using a client soft to connect in windows
There are many ways of connecting using a USB modem
1) using wvdial (Refer my sig blog) .... wvdial is a generic software client
2) Gnome-ppp software.... this is the easiest
3) Network manager -> Mobile Broadband wizard
but for more specific directions .... u have to provide more info on your isp