Hi, I have looked at http://www.cisco.com/en/US/docs/ios/voice/cdr/developer/guide/cdrdefs.html, I found the possible values for atribute “gw-rxd-cgn”, but not the meaning of them. Example:Cisco-AVPair = "gw-rxd-cgn=ton:0,npi:0,pi:1,si:0,#:391450098"...