Configuring ISDN PRI

Router(config)#isdn switch-type switch-type	Same command as with BRI. Can be done globally or in interface config mode
Router(config)#controller t1 1/0	Enters into controller config mode where the PRI card is located
Router(config-controller)#framing {sf | esf}	Sets framing to either Superframe Format (SF) or Extended Superframe Format (ESF) as dictated by the service provider. ESF is the most commonly used framing
Router(config-controller)#linecode {ami | b8zs | hdb3}	Sets Layer 1 signaling method to alternate mark inversion (AMI), binary 8-zero substitution (B8ZS) or high-density bipolar three (HDB3). B8ZS is used in North America
Router(config-controller)#pri-group timeslots 1-24	Configures the number of timeslots allocated by the provider, if using a channelized T1 controller
Router(config-controller)#interface serial0/0:23	Specifies an interface to be used for PRI D-channel operation. This command says to use channel 24 of interface Serial 0/0

Note:

Channels are numbered starting at zero (0) not one (1). Therefore, the 16th channel would be numbered 15; channel 24 would be numbered 23.

Caution:

Subinterfaces on a serial interface are shown with a dot (.). Channels are shown with a colon (:). For example,

Serial0/0.23 is subinterface 23.

Serial 0/0:23 is channel 23.