Cisco Systems XR 12000 SIP-601 Manual De Usuario

Before configuring serial interfaces, be sure that the following tasks and conditions are met:

You must be in a user group associated with a task group that includes the proper task IDs for serial 
Interface commands. Task IDs for commands are listed in Cisco IOS XR Interface and Hardware 
Component Command Reference.

Your hardware must support T3/E3 controllers and serial interfaces. The following hardware 
supports T3/E3 controllers and serial interfaces in Cisco IOS XR Software Release 3.3:

2-Port and 4-Port Clear Channel T3/E3 SPAs

2-Port and 4-Port Channelized T3 SPAs

The 2-Port and 4-Port Channelized T3 SPAs support T1/E1 controllers and DS0 channels.

You have already configured the clear channel T3/E3 controller or channelized 
T3-to-T1/E1controller that is associated with the serial interface you want to configure, as described 
in the 

 module earlier in this document.

Serial interfaces are supported on the following Cisco XR 12000 Series Router shared port adapter 
(SPA) cards:

2-Port and 4-Port Clear Channel T3/E3 SPAs

2-Port and 4-Port Channelized T3 SPAs

The 2-Port and 4-Port Channelized T3 SPAs can run in clear channel mode, or they can be 
channelized into 28 T1 or 21 E1 controllers. 

T3/E3 serial interfaces are automatically created on clear channel T3/E3 controllers. On channelized 
T3-to-T1/E1 controllers, serial interfaces are automatically created when users configure individual DS0 
channel groups the T1/E1 controllers.

To configure serial interfaces, you must understand the following concepts: