Hi. I have 7 external roller shutters in my house. I have a zamel srp-02 controller mounted at each one and I control them only with a zamel p-256/36 remote control (I have no switches mounted) I raise and lower them individually, but I would also like to control all of them simultaneously. How do I do this? I don't own any central on/off switch. I do, however, have a zamel rnp-01 transmitter. Is it possible to get hold of this?