serial modem secure file transfer using labview

[Asad_Tirmizi]

I have remained a lab view enthusiast for quite some time now doing free lance projects on it. But the scope of my projects has remained limited to purely software VI's without any hardware component involved. But i have recieved a project which deals with serial ports and modems. I have tried transfering text using serial cables,and AT commands through the modem and ive been able to do that using hyper terminal. Now i require to do the same thing using labview. To put it more objectively. I have the following goals to establish on LV 8.2

i need to establish a serial connection between two labview computers.
Then i need to be able to transmit and recieve text on both sides. Duplex communication
Lastly if i need to send a text file i should be able to do that. A browse window should open up in the VI which will let me select any text file and then i should be able to transmit it to the destination PC in a pre designated foder.
Before commencing the file transfer the VI should ask for a password in a dialog box. Which if matches will let the transfer proceed.

Now the problems i am having are as follows.

Do i need modems to do all that or should i simply jack up my two computers with the serial cable ?
I have almost succeeded in making a trans/recieve module for sending instant texts through the serial cable. Are there any limitations to it ?
Can this file transfer be done .. is it possible to do that through a serial cable. Specially by using the password.

I will be very great ful if u help with experiences, comments or any past work u r willing to share.

Regards

Asad.

[Cory_K]

May I ask why you chose serial communication (I'm assuming you are going to use RS232)?
I would recommend ethernet instead, unless RS232 was specifically chosen for some other reason.

You could then set up an adhoc network between the two computers, which would ensure the data transfer was secure.

Message Edited by Cory K on 09-11-2009 12:55 PM