Max interface Specs for a PIX 535 gig/fiber interfaces

[sheidelbach]

I have a PIX 535 that already has 3 gig/fiber interfaces + 2-10/100 NICS in it, and 5 open slots. Question is, is there a limit to how many more Gig/fiber interfaces I can put in it?

I'm surfing CCO for the specs and if there are limits to how many in what slots, but have not found the data I need yet.

Thanks!

[umedryk]

You can add more interfaces but you need liscence from Cisco.