Installation guide

Software Configuration 5-13

Additional Configuration Tasks

For more information about the media-type command, refer to the Cisco IOS conﬁguration

guides and command references.

Conﬁguring the T1 Interface

If you installed a new channelized T1/ ISDN PRI (CT1/PRI) network processor module, or

if you want to change the conﬁguration of an existing network processor module, you must

enter conﬁguration mode to conﬁgure or reconﬁgure the interface. If you replaced a

CT1/PRI module that was previously conﬁgured, the system will recognize the new

CT1/PRI module and bring it up with the existing conﬁguration.

When you have veriﬁed that the new CT1/PRI module is recognized by the router, use the

conﬁgure command to conﬁgure the new CT1/PRI module. Have the following

information ready when you begin your conﬁguration:

• T1 information—for example, clock source, line code, and framing type

• Channel group and time-slot mapping

• Protocols and encapsulations you plan to use on the new interfaces

• Internet protocol (IP) addresses if you will conﬁgure the interfaces for IP routing

• Whether the new interface will use bridging

Take the following steps to complete a basic T1 conﬁguration:

Step 1 At the privileged-level prompt, enter the conﬁguration terminal command to

enter conﬁguration mode and specify that the console terminal will be the source

of the conﬁguration commands:

Router# conf t

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#

Step 2 Enter the controller t1 command to specify the unit number of the network

processor module you are conﬁguring. For more information on unit numbers,

refer to the section “Unit Numbering” in the chapter “Cable Connection.” For

example, if you are conﬁguring unit number 1, enter the following command:

Router(config)# cont t1 1