Forwarding a phone that is in Night coverage

[Shermanchicken]

I have a Magix system that is set up when the night service button is pushed it rings 6 phones in that group at night. One of the phones in that group they want it to forward to a cell phone. It doesn't work now and they said it did before. Is it possible to have a call ring the 5 in house phones and a cell phone in the night group?

 

[phonesaz]

Are you saying that one of the phones, if it is chosen specifically, should go to the cell phone instead of night service, or are you saying after 'x' number of rings any incoming call should transfer to an extension that forwards it to a cell phone?