Problem Statement: PCB based systems ...where current flow to external 
                   ex: mtu [RF] / modem/ network cable in a computing environments
                   say ....personal computing etc.
                  
Opportunity :  Potential usage of a voltometer ....

               Potential usage of a led or say kind of a starter(observed in tubelight) 

               viz. to indicate data flow on the cable.     


Note: The above problem statement having been encountered in various scenarios
      and detailed in various 'Proof of concepts' as mentioned in 
      
       http://uk.geocities.com/ravivenkatus/projects.pdf
       http://ravishankarkv.tripod.com/projects.pdf
        ....apply appropriate
      'use-case' modeling, rationalize and arrive at a workable and feasible 
       solution both commercially and techinically viable.