Application and device control policy issue

Dear All,

I have created a policy in SEPM 12.1.4 for USB Block and some data card  allow, But it is not working properly, after applying this policy all web camera get blocked even some scanner’s and printer’s are blocked.

I have already excluded all printer and data card ( Vodafone 3 G, MTS, Tata photan) etc and printer. By device ID.

Even it is very difficult to provide all printer’s device ID, and data cards device ID and scanner device ID.

Is there any way to allow all printer by providing single device ID or class ID.