Hi, Is it correct ? May i use %{tolower:&Called-Station-Id} ? Wrong: (0) update request { (0) EXPAND %{Calling-Station-Id}@%{tolower:&Called-Station-Id} (0) --> 421917446704@&called-station-id (0) User-Name := 421917446704@&called-station-id (0) } # update request = noop Thx.