RP/0/RP0/CPU0:N540# config terminal
Sat May  4 19:37:35.241 UTC
opRP/0/RP0/CPU0:N540(config)#controller optics 0/0/1/0
RP/0/RP0/CPU0:N540(config-Optics)#breakout ?
  WORD  4x10 | 4x25 | 1x40 | 2x50 | 8x50 | 4x100 | 3x100 | 2x100 | 1x100 | 8x100
RP/0/RP0/CPU0:N540(config-Optics)#breakout 4x10
RP/0/RP0/CPU0:N540(config-Optics)#commit 
Sat May  4 19:38:32.121 UTC

RP/0/RP0/CPU0:N540(config-Optics)#exit
RP/0/RP0/CPU0:N540(config)#exit