You have 4 port card, each one named as
DADHI/1 DAHDI/2 DAHDI/3 DAHDI/4
Also you can group any number of ports and use group like
DAHDI/g0
You can check what exactly you configured by issue
dahdi_cfg -vvv
You can see what is gooing on on your asterisk server via console
asterisk -r
For more info about configuration see