Cisco 10000 Series Configuration Manual page 201

Chapter 7 4-Port Channelized OC-3/STM-1 Line Card Configuration
VT Commands under SONET Framing
This section describes how to use the controller vt command to further channelize the SONET-framed
STS-1 controller of the 4-port STM-1 line card.
Entering Controller Configuration Mode for VT
A virtual tributary (VT) controller on a 4-port STM-1 line card can be channelized into 28 T1 (VT1.5)
interfaces or 21 E1 (VT2) interfaces. You can use the controller vt command to shut down a VT link or
to change the settings for a T1 or E1 interface.
For information about T1 configuration settings, see
or SDH Framing" section on page
Framing" section on page
You can configure a VT link by entering the controller vt command.
slot/sub-slot/port.path
Where path is a value from 1 to 12. Each number represents a VT that houses 28 T1 lines or 21 E1 lines.
For example:
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)# controller vt 1/0/0.1
Router(config-controller)#
Unchannelized T3 Commands under SONET or SDH Framing
This section shows you how to configure an unchannelized T3 on a SONET-framed or SDH-framed
controller.
If the 4-port STM-1 line card is configured for SONET framing, a T3 interface is channelized into
28 T1 interfaces by default. You must unchannelize the T3 interface to create a full-rate or subrate T3
interface.
If the 4-Port Channelized OC-3/STM-1 line card is configured for SDH framing, C-3 container mode
automatically creates an unchannelized T3 serial interface.
This section describes the commands you use to create, customize, and test full-rate and subrate T3
interfaces. This section describes the following:
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You can also use the following commands, described in the
or SDH Framing" section on page
equipment, and loopback.
OL-8834-04
7-29.
Entering Controller Configuration Mode for T3, page 7-18
Configuring a T3 Interface on a SONET-Framed Controller as Unchannelized, page 7-18
Implementing Subrate T3, page 7-18
Setting a Framing Type, page 7-19
Specifying a DSU Mode, page 7-19
Enabling Scrambling, page 7-19
Specifying the Idle Character, page 7-19
Running a T3 BER Test under SONET or SDH Framing, page 7-20
"Creating T1 or E1 Channel Groups under SONET
7-26, and the "Channelized T1 Commands under SONET or SDH
"Channelized T3 Commands under SONET
7-21, when you configure unchannelized T3: clock source, mdl,
Cisco 10000 Series Router Line Card Configuaration Guide
Creating a T3, VT, or AUG Controller
7-17