i want to a awk or perl script filter a file contains the following items
"Date","Time","RAS-Client","Record-Type","Full-Name","Auth-Type","User-Nam
e","NAS-IP-Address","NAS-Port",,,,,,,,,,"Login-IP-Host","Login-Service","L
ogin-TCP-Port","Callback-Number","Callback-ID",
"07/17/2006","07:35:43","WAN","Start","Unknown","Unknown","apmc","10.16.0.
2
","20000","2","1",,,,,,,,,,,,,,,,,,"9560","53539180",
"07/17/2006","07:35:43","WAN","Start","Unknown","Unknown","aaac","10.16.0.
2
","20000","2","1",,,,,,,,,,,,,,,,,,"9560","57532280",..............
..................
I want to have the layput as follow
Date Time Username Phone_No. IP_address