Data transfer using Sound cards

Hi All

I am a beginner to the GNU Radio world …so i apologize ahead if i am
taking much of your precious time.

I am trying to transfer data between two PCs running Ubuntu9.04 gnuradio
3.2.2 using a wired channel via sound cards.Looking in the mail list
archive i found a similar topic but with no replies.

My target is to implement an OFDM Transceiver over wired channel using
gnuradio (ADSL modem).At this time i managed to send signals through the
sound card using NBFM Transmitter but i can’t acquire any Rx signal at
the destenation PC Line in.

I need to know how to deal with sound cards to be able to exchange data
between the source and destination.

Thanks in advance

Ahmed H Fayez