gives new port and channel numbers . Format of mapping list : (((oldport oldchannel) (newport newchannel)) ((oldport oldchannel) (newport newchannel))...) ex : ( ((0 1) (3 5)) ((1 3) (1 7)) ((1 9) (2 11)) ) if one change only, don't forget outer brackets : ( ((0 1) (3 5)) )