Refer to the exhibit.

Assuming this NFAS-enabled T1 PRI configuration on a Cisco IOS router is fully functional, what
will the controller T1 1/1 D-channel status be in the output of the show isdn status command?

A.
MULTIPLE_FRAME_ESTABLISHED

B.
TEI_ASSIGNED

C.
AWAITING_ESTABLISHMENT

D.
STANDBY

E.
INITIALIZED

Explanation:
TEI_ASSIGNED, which indicates that the PRI does not exchange Layer 2 frames
with the switch. Use theshow controller t1xcommand to first check the controller t1 circuit, and
verify whether it is clean (that is, it has no errors) before you troubleshoot ISDN Layer 2 problem
with thedebug isdn q921.