How many 4 port T1 cards can be ran in one system

I have a project that requires 10 T1’s. Has anyone used more than 2 -4 port cards in one system?

its generally not a good idea to have more than 4 t1’s in one box unless its a really really big box or you aren’t using low-bit codecs (g.729, ilbc, etc) that use lots of cpu. YMMV of course based on your hardware.