Voice Cards

I am looking into building an Asterisk box to replace our PBX solution at mu current place of employment, but want to keep the cost as low as possible.
I have been looking through the documentation for Asterisk, but cannot find references to the physical cards needed. Do they have to be the Digium cards or can they be say Dialogic cards? I ask this mainly because we have Dialogic cards on hand and would like to be able to tell my higher-ups that we do not need to purchase any additional equipment. Any ideas on this?

As far as I know chan_dialogic is only available in * business edition, Its a licensing thing AFAIK