rasdial in windows

phone book is located in :
C:\Users\[username]\AppData\Roaming\Microsoft\Network\Connections\Pbk
filename : rasphone.pbk
connection names in this file can be dialed by rasdial command line

rasdial.exe connection_name user pass
example : rasdial myVpn nic musuperpass
to disconnect user /disconnect switch rasdial myVpn /disconnect