Refer to the exhibit. After you configure the is dns witch -type primary- ni command and the T1
controller, which configuration is implemented?

A.
Only the following lines are added: interface Serial0/2/0:23noip address encapsulation hdlc isdn
switch- type primary -ni no cdp enable voice -port 0/2/0:23The command isdn incoming-voice
voice must be added for voice under interface Serial0/2/0:23.

B.
The Cisco IOS router does not add any configuration. The following configuration must be
added manually: interface Serial0/2/0:23 no ip address encapsulation hdlc isdn switch-type
primary- ni isdn incoming- voice voice no cdp enable voice -port 0/2/0:23

C.
The Cisco IOS router adds the following configuration: interface Serial0/2/0:23no ip address
encapsulation hdlc isdn switch- type primary -ni isdn incoming- voice voice no cdp enable voice –
port 0/2/0:23

D.
OnlyinterfaceSerial0/2/0:23andvoice-port 0/2/0:23areadded.The following lines must be added
under interface Serial0/2/0:23: no ip address encapsulation hdlc isdn switch- type primary- ni isdn
incoming- voice voice no cdp enable