Call Blocking on FSX phone

Call blocking on voice port.

I set a call blocking on a CCME system: "after-hours block pattern 1

9011 7-24" on telephony-service and "after-hour exempt" on some ephones. It works fine.

Cisco says "Call blocking is supported on IP phones only and not on foreing exchange station (FXS) phones".

I have a fxs port (the fax machine) that is affected by the call blocking and I do not know how to exclude the port for that feature.

Any ideas for a workaround?

I think I will have the same situation if using Class of Restriction.

Thanks in advanced,

c