Which configuration output indicates a properly configured T1 digital voice interface?

Which configuration output indicates a properly configured T1 digital voice interface?
A . controller T1 0/0/0
framing esf
linecode b8zs
pri-group timeslots 1-24
!
B . isdn switch-type primary-ni
!
controller T1 0/0/0
framing esf
linecode b8zs
!
C . isdn switch-type primary-ni
!
controller T1 0/0/0
framing esf
linecode b8zs
pri-group timeslots 1-24
isdn switch-type primary-ni
!
D . isdn switch-type primary-ni
!
controller T1 0/0/0
framing esf
linecode b8zs
!
dial-peer voice 1 pots
destination-pattern 54….
direction-inward.dial
port 0/0/0:23

View Answer

Answer: C