A PRI (Primary Rate Interface) is a telecommunication standard used in the Integrated Services
Digital Network or ISDN, for carrying multiple DS0 voice and data transmissions between two
physical locations. PRI was developed specifically for industrial or large quantity users. PRI is an
industrial ISDN line while the Basic Rate Interface, or BRI, is used to cater to home and small
enterprises. Which three characteristics apply to ISDN PRI? (Choose three)

A.
PRI offers 20 B channels and 1 D channel

B.
the D channel is 64 kbps

C.
can carry data, voice, or video

D.
can carry vendor-specific PBX features