To Speed-up the time it takes for DUN (Dial Up Networking) to establish a connection with your ISP (Internet Service Provider):
1. Select your connection in DUN (Start > Programs > Accessories > Communications > Dial-Up Networking)
2. Right-click your connection and choose Properties
3. On the Server Types Tab, under Advanced Options, make sure that the check-box for Log on to network is unchecked
4. Under Allowed network protocols select only TCP/IP 
How to Speed-up your Connecting time