8 call flow flip

[set-call-flow-toggle]
exten => 289,1,Answer
exten => 289,2,Set(togglestate=${DB(DAYNIGHT/C0)})
exten => 289,3,GotoIf($[${togglestate} = NIGHT]]?13:4)
exten => 289,4,Set(DB(DAYNIGHT/C0)=NIGHT)
exten => 289,5,Set(DB(DAYNIGHT/C1)=NIGHT)
exten => 289,6,Set(DB(DAYNIGHT/C2)=NIGHT)
exten => 289,7,Set(DB(DAYNIGHT/C3)=NIGHT)
exten => 289,8,Set(DB(DAYNIGHT/C4)=NIGHT)
exten => 289,9,Set(DB(DAYNIGHT/C5)=NIGHT)
exten => 289,10,Set(DB(DAYNIGHT/C6)=NIGHT)
exten => 289,11,Set(DB(DAYNIGHT/C7)=NIGHT)
exten => 289,12,Hangup
exten => 289,13,Set(DB(DAYNIGHT/C0)=DAY)
exten => 289,14,Set(DB(DAYNIGHT/C1)=DAY)
exten => 289,15,Set(DB(DAYNIGHT/C2)=DAY)
exten => 289,16,Set(DB(DAYNIGHT/C3)=DAY)
exten => 289,17,Set(DB(DAYNIGHT/C4)=DAY)
exten => 289,18,Set(DB(DAYNIGHT/C5)=DAY)
exten => 289,19,Set(DB(DAYNIGHT/C6)=DAY)
exten => 289,20,Set(DB(DAYNIGHT/C7)=DAY)
exten => *289,21,Hangup