There are two offices and both offices are connected with optical fiber for voice sharing on phone. Now I want to connect both offices via dial up for data sharing. I want to dial the number of other office from a computer dial up or from some other application to make a connection with the computer on other office. So a connection will be established for data sharing. Please help me in this regard. Which application will be used for this purpose. I want to send data on same optical fiber which is used to carry voice signel.