exten => _X.,n,Set(on_net=${SIP_HEADER(X-On-Net)})
exten => _X.,n,Set(CDR(testing1)="SUCCESSS")
exten => _X.,n,NoOP(${CDR(testing1)})
exten => _X.,n,Set(CDR(on_net)=${on_net})
exten => _X.,n,NoOP(${CDR(testing1)})