> How can I use uc function below in order to change lower case to upper > case? > > Ex. 00-18-e7-41-ad-c2 ---> 00-18-E7-41-AD-C2 It's a perl function. So you put in sub authorize: $RAD_REQUEST{'Calling-Station-Id'} = uc($RAD_REQUEST{'Calling-Station-Id'}) Ivan Kalik Kalik Informatika ISP