?communication

i have an internet connection(at home) through dial-up line from BSNL(via phone line).
In my workplace, i have a machine in which i have been working during my worktime.
Any IP address is not assigned to my machine which is resided at my home.
I want to communicate between those two machines.
Actually,i want to transfer files via ftp or telnet.
Please, give me suggestion in this matter as soon as possible.