Cisco AVpair(client-mac-address) and Calling-Station-Id attribute

Hello, I am using freeradius 1.1.8 with a Cisco7301 router as a NAS, but the NAS does not send the Calling-Station-Id attribute, insted it uses "Cisco-AVPair = "client-mac-address=000f.ea20.e1ad"" They have changed this attribute in modern IOS versions. I want to know if there is a possibility to rewrite the : Cisco-AVPair = "client-mac-address=000f.ea20.e1ad" to "Calling-Station-Id = 000f.ea20.e1ad" Also, i am using some other NASes that use the standart Calling-Station-Id, with the same radius. Thank You! Egi